1001 Smart Cities
🇧🇩 Dhaka

Pre-Monsoon Aedes Larval Survey and Ward-Targeted Drives

🤖 AI-generated summary of the sources below · 🔎 Last verified · ◆ 16 sourced claims, none individually verified yet

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

Dhaka's two city corporations choose where to send mosquito crews from a larval index. Surveyors sample households ward by ward and score each ward on the Breteau Index — positive containers per 100 houses inspected, where anything above 20 is treated as the danger line — alongside the House, Container and Pupa indices. Dhaka South City Corporation ran the survey under its own management for the first time in May 2026: 36 field workers, 2,250 households, thirty in each of its 75 wards, twelve days, recorded on the KoboToolbox platform.

Live
Outcome🔄 Ongoing
Evidence🏛️ Official
what does this mean?The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →
Run byDhaka South City Corporation and Dhaka North City Corporation, with the Communicable Disease Control programme of the Directorate General of Health Services (DGHS) and the Institute of Epidemiology, Disease Control and Research (IEDCR)
Scale🏙️ City-wide

📊 Impact

The May 2026 round found Aedes larvae or pupae in 281 of the 2,238 households inspected and put 63 of Dhaka South's 75 wards above the threshold, 27 of them at extreme risk; 35.23 per cent of the infested premises were multi-storey buildings. Dhaka South ran a five-day crash programme in those 27 wards from 7 June and said it would extend it to the 36 moderately risky wards the following week. Dhaka North had announced 53 Saturday cleanup drives between March and May in the 25 wards that IEDCR and health directorate surveys named as most vulnerable, and its own survey in mid-June recorded Breteau values from 20 to 73.33 across five high-risk areas. Entomologists say there is no field-level survey to assess whether the control effort works.

🎓 Lesson

A reading is worth something when something follows from it, and here something does: the ward at the top of the index is the ward the crews are sent to, and Dhaka South calls that a survey-based, data-driven strategy rather than routine mosquito control. What the loop lacks is a return leg. Dhaka South's own chief health officer was worried enough in February 2026 to convene a committee — chaired by the waste chief and deliberately excluding health department officials — to establish whether the insecticides kill anything in the field. The two halves of the surveillance never meet either: the ward index counts containers, while the national dengue dashboard breaks its case counts down to the two city corporations and no further, on a system a peer-reviewed study of the 2023 outbreak found captured only cases reported in government-approved hospitals, with the true total estimated at four times the reported one.

👥 SocietyHealth & careWaste & recycling

Sources

↗ BSS — DSCC launches its own pre-monsoon Aedes larvae survey (state news agency)Published 10 May 2026Bangladesh's state news agency on the day DSCC inaugurated the survey. States that DSCC ran a scientific pre-monsoon Aedes larvae survey under its own management for the first time, and gives the method: 2,250 sample houses, 30 from each of the corporation's 75 wards, a 12-day survey by 36 field workers drawn from DSCC and the Communicable Disease Control wing of DGHS, with data collected on KoboToolbox.
↗ BSS — DSCC launches crash programme in 27 high-risk wards (state news agency)Published 6 June 2026The results and the response in one piece. Carries the survey dates (12 to 23 May), the four entomological indicators used (Breteau, House, Container and Pupa), 63 of 75 wards above the threshold with 27 highly vulnerable, 281 infested households out of 2,238 visited, 35.23 per cent of them multi-storey, and the five-day crash programme in the 27 high-risk wards from 7 June extending to 36 moderately risky wards the week after. Quotes the DSCC administrator describing a survey-based, data-driven strategy rather than routine mosquito control.
↗ The Daily Star — 63 of 75 DSCC wards at dengue risk (media)Published 5 June 2026Independent daily reporting the same announcement, made at a DSCC event titled 'Presentation of Pre-Monsoon Aedes Larvae Survey Results and Action Plan'. Confirms the 36-member joint DSCC/DGHS team, the 2,250 households, KoboToolbox, the 63/27 ward split and the crash programme, and adds that the programme is jointly coordinated by DSCC's Health Department and Waste Management Department.
↗ The Daily Star — 13 Dhaka wards at high risk, DGHS/IEDCR pre-monsoon survey (media)Published 18 June 2025 · updated 19 June 2025The national version of the same instrument a year earlier: a pre-monsoon survey run jointly by the DGHS Communicable Disease Control programme and IEDCR across 99 wards of the two corporations in February, March and May 2025. Defines the Breteau Index as positive containers per 100 houses inspected and gives 20 as the threshold above which the situation is treated as uncontrollable. Lists the 13 wards that exceeded it with their individual index values, and records that the report urged a year-round larvicidal programme in wards with a high Breteau and House Index.
↗ BSS — DNCC launches Saturday mosquito control campaign in 25 high-risk wards (state news agency)Published 13 March 2026 · updated 14 March 2026The Dhaka North half of the same mechanism. States that IEDCR and DGHS surveys identified 25 DNCC wards as most vulnerable to Aedes mosquitoes, and that 53 'Saturday's Pledge' campaigns would run in those 25 wards from March to May, every Saturday from 8am to noon, jointly by DNCC's Health and Waste Management departments with the corporation's entomologists.
Show 8 more sourcesShow fewer
↗ Prothom Alo — High levels of Aedes larvae in Dhaka, higher outside (media)Published 30 June 2026Independent confirmation of the DSCC 63/27 result and the source for Dhaka North's own surveillance round of 12 to 16 June 2026, which recorded Breteau values from 20 to 73.33 across five high-risk areas with an average above 40. Quotes DNCC's chief health officer. Also carries larval densities from outside Dhaka that are higher than the capital's, which is why the entry does not claim Dhaka is the worst-affected place.
↗ Prothom Alo — Mosquitoes not dying despite drives, committee formed (media)Published 20 February 2026The operator auditing itself. DSCC's chief health officer prompted the formation of a committee to establish whether the insecticides actually kill mosquitoes in the field; to keep it neutral, no health department officials sit on it and the chief waste management officer chairs it. Also gives the staffing rule (seven larvicide workers per ward in the morning, six fogging in the afternoon, 1,030 workers in total) and a reporter's two-hour tour of Ward 20 that found none of them.
↗ The Business Standard — Are city corporations' anti-mosquito drives effective? (media)Published 16 October 2024Independent entomologists on the missing half of the loop. Manjur A Chowdhury, former president of the Bangladesh Zoological Society, states there is no field-level survey to assess whether the dengue control efforts are effective, and that fewer than one in ten mosquitoes die after fogging. GM Saifur Rahman argues the effort lacks centralised data on which areas hold the most Aedes and where patients come from.
↗ The Business Standard / BSS — Govt's preventive steps help keep dengue situation under control (state news agency)Published 16 August 2026Currency check, and the most recent confirmation that DSCC ran the pre-monsoon larva survey under its own management for the first time this year. Also records that DNCC's distinctive contribution this season was an awareness campaign built on music, and gives DGHS national case and death totals to 13 August for 2026 against 2025 — national figures, not Dhaka ones.
↗ Open Forum Infectious Diseases — The Epidemiologic and Clinical Characteristics of the 2023 Dengue Outbreak in Bangladesh (peer-reviewed)Published 1 February 2024Peer-reviewed analysis of the 2023 outbreak, used only for what the national case count is and is not. States that because surveillance included only cases reported in government-approved hospitals there was significant underreporting, and that the estimated number of dengue cases is four times greater than the reported number. Date taken from Crossref (issued 2024-02-01; online 2024-02-02) for DOI 10.1093/ofid/ofae066.
↗ DGHS — Dengue Dynamic Dashboard for Bangladesh (authority)The live national dengue dashboard run by the DGHS Health Emergency Operation Centre and Control Room, updated daily from the dengue press release. Its geography stops at the division and city-corporation level — cases and deaths by division and city corporation, and separate totals for cases inside and outside city corporations — with no ward breakdown, which is why the case data cannot be laid over the ward larval index. A live dashboard states no publication date.
↗ Local Government Division — Immediate Action Plan to Prevent Dengue Outbreak in Bangladesh, workshop report (authority)The government's own record of a multi-stakeholder dengue workshop convened by the Local Government Division under the World Bank-supported Improving Urban Public Health Services Project. Names the gaps in the government's own words: incomplete disease surveillance data limiting timely decision-making, absence of baseline data on vector populations and no sentinel surveillance system, a shortage of trained entomologists, and — from Prof. Rashedul Islam — that current dengue surveillance is hospital-based. Hosted on the ministry's object storage; the document itself states no date, and the year and month in the storage path are an upload path, not a publication date.
↗ Gavi VaccinesWork — Bangladesh has a dengue-fighting mobile app (media)Published 28 April 2026Carries the DGHS entomologist's statement that the Aedes surveys are conducted in Dhaka at pre-monsoon, monsoon and post-monsoon, which establishes the cadence. Also the honest measure of the separate citizen-science app: Mosquito Alert, rolled out by the research institute icddr,b in September 2025, had 227 participants by mid-April 2026 and its scientist describes the operation as limited in scale for lack of manpower and logistics.

📅 How old is the evidence?

Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. 11 of 13 sources carry a publication date, from 1 February 2024 to 16 August 2026.

When the sources were published

  1. Open Forum Infectious Diseases — The Epidemiologic and Clinical Characteristics of the 2023 Dengue Outbreak in Bangladesh (peer-reviewed)
  2. The Business Standard — Are city corporations' anti-mosquito drives effective? (media)
  3. The Daily Star — 13 Dhaka wards at high risk, DGHS/IEDCR pre-monsoon survey (media) · updated 19 June 2025
  4. Prothom Alo — Mosquitoes not dying despite drives, committee formed (media)
  5. BSS — DNCC launches Saturday mosquito control campaign in 25 high-risk wards (state news agency) · updated 14 March 2026
  6. Gavi VaccinesWork — Bangladesh has a dengue-fighting mobile app (media)
  7. BSS — DSCC launches its own pre-monsoon Aedes larvae survey (state news agency)
  8. The Daily Star — 63 of 75 DSCC wards at dengue risk (media)
Show 3 more dated sourcesShow fewer
  1. BSS — DSCC launches crash programme in 27 high-risk wards (state news agency)
  2. Prothom Alo — High levels of Aedes larvae in Dhaka, higher outside (media)
  3. The Business Standard / BSS — Govt's preventive steps help keep dengue situation under control (state news agency)

Every source, with links ↑

What happened to this record

  1. Entered the record
  2. Sources last read

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 16 claims with their sources · the forensic record

Evidence Passport · public beta 16 addressable claims, 13 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 16

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-f832bb3df60db1c5 descriptive
Dhaka's two city corporations choose where to send mosquito crews from a larval index
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
BSS on Dhaka South: 'Based on the findings, DSCC has decided to launch a special crash program in these most affected areas.' BSS on Dhaka North: the 53 Saturday campaigns run in the 25 wards that 'have been identified as most vulnerable to Aedes mosquitoes' by IEDCR and DGHS surveys. Two corporations, two survey sources, the same rule for choosing where crews go.
Caveat
The rule is not exclusive. A seven-day crash programme announced for Kamrangirchar on 31 July 2026 was declared after Friday prayers with no survey cited, so some drives are selected another way.

Sources carrying this claim

  1. BSS — DSCC launches crash programme in 27 high-risk wards (state news agency)
  2. BSS — DNCC launches Saturday mosquito control campaign in 25 high-risk wards (state news agency)
Claim 2 clm-d0713d216c18c1ed quantitative
Surveyors sample households ward by ward and score each ward on the Breteau Index — positive containers per 100 houses inspected, where anything above 20 is treated as the danger line
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'Aedes larvae density is measured using the Breteau Index (BI), which assesses the number of positive containers per 100 houses inspected. A BI over 20 indicates an uncontrollable situation and a heightened risk of a dengue outbreak, according to global standards.' The same piece reports the survey covering 99 wards of the two corporations and lists each qualifying ward with its own index value.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. The Daily Star — 13 Dhaka wards at high risk, DGHS/IEDCR pre-monsoon survey (media)
Claim 3 clm-61b85c2a44825ae7 descriptive
alongside the House, Container and Pupa indices
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'The survey results were analyzed using key entomological indicators, including the Breteau Index (BI), House Index (HI), Container Index (CI) and Pupa Index (PI), providing a scientific assessment of mosquito breeding density and dengue risk across different areas.'
Caveat
Only the Breteau values are reported publicly ward by ward; the House, Container and Pupa values for individual wards were not published in any source read.

Sources carrying this claim

  1. BSS — DSCC launches crash programme in 27 high-risk wards (state news agency)
Claim 4 clm-296a233485b4a43d quantitative
Dhaka South City Corporation ran the survey under its own management for the first time in May 2026
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
BSS on the inauguration day, 10 May 2026: 'Dhaka South City Corporation (DSCC) today launched a scientific pre-monsoon survey on Aedes mosquito larvae under its own management for the first time'. The administrator is quoted saying 'For the first time, we are conducting this survey independently using scientific methods.' Restated three months later in the government's own account of the season.
Caveat
First time under DSCC's own management, not the first survey. Ward-level Aedes surveys of both corporations were being run by the national health directorate well before this.

Sources carrying this claim

  1. BSS — DSCC launches its own pre-monsoon Aedes larvae survey (state news agency)
  2. The Business Standard / BSS — Govt's preventive steps help keep dengue situation under control (state news agency)
Claim 5 clm-6f46f359b8009750 quantitative
36 field workers, 2,250 households, thirty in each of its 75 wards, twelve days, recorded on the KoboToolbox platform
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
BSS launch piece: '2,250 houses have been selected as samples, with 30 houses chosen from each of the corporation's 75 wards. The 12-day survey is being conducted through random sampling by 36 field workers from DSCC and the Communicable Disease Control wing of the Directorate General of Health Services (DGHS). The digital platform "KoboToolbox" is being used'. BSS results piece repeats it, and The Daily Star independently reports the 36-member team, the 2,250 households and KoboToolbox.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. BSS — DSCC launches its own pre-monsoon Aedes larvae survey (state news agency)
  2. BSS — DSCC launches crash programme in 27 high-risk wards (state news agency)
  3. The Daily Star — 63 of 75 DSCC wards at dengue risk (media)
Claim 6 clm-69b2ffdd69697729 quantitative
The May 2026 round found Aedes larvae or pupae in 281 of the 2,238 households inspected
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'During the survey, inspectors visited 2,238 households and detected Aedes larvae and pupae in 281 of them.'
Caveat
The sample was designed as 2,250 households; 2,238 were actually visited. No source explains the twelve-household difference.

Sources carrying this claim

  1. BSS — DSCC launches crash programme in 27 high-risk wards (state news agency)
Claim 7 clm-b14c160d5d458137 quantitative
put 63 of Dhaka South's 75 wards above the threshold, 27 of them at extreme risk
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The Daily Star: 'Among the 75 wards under Dhaka South City Corporation, 63 were found to have Aedes mosquito densities above the prescribed threshold, while 27 have been identified as being at extreme risk of dengue transmission.' Prothom Alo, three weeks later and independently: 'In Dhaka South City Corporation's pre-monsoon survey, 63 of its 75 wards recorded Breteau Index values above 20. Among them, officials identified 27 wards as "extremely high-risk".'
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. The Daily Star — 63 of 75 DSCC wards at dengue risk (media)
  2. BSS — DSCC launches crash programme in 27 high-risk wards (state news agency)
  3. Prothom Alo — High levels of Aedes larvae in Dhaka, higher outside (media)
Claim 8 clm-64646330d6a738ab quantitative
35.23 per cent of the infested premises were multi-storey buildings
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'Multi-story buildings accounted for the highest proportion of infested premises at 35.23 percent.' The same source draws the conclusion that dengue risk is no longer confined to low-income neighbourhoods.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. BSS — DSCC launches crash programme in 27 high-risk wards (state news agency)
Claim 9 clm-588d5e7f02fdb1bd quantitative
Dhaka South ran a five-day crash programme in those 27 wards from 7 June and said it would extend it to the 36 moderately risky wards the following week
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
BSS: 'The most important of these is a five-day special crash program in the 27 high-risk wards beginning on June 7' and 'Salam said similar operations would also be conducted in another 36 moderately risky wards during the following week.' The Daily Star reports the same plan and adds that Health and Waste Management jointly coordinate it.
Caveat
Both sources describe the programme as announced and beginning; neither reports afterwards on whether the five days were completed in all 27 wards or whether the extension to the 36 wards happened.

Sources carrying this claim

  1. BSS — DSCC launches crash programme in 27 high-risk wards (state news agency)
  2. The Daily Star — 63 of 75 DSCC wards at dengue risk (media)
Claim 10 clm-d94fb83f51a20253 quantitative
Dhaka North had announced 53 Saturday cleanup drives between March and May in the 25 wards that IEDCR and health directorate surveys named as most vulnerable
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'According to surveys conducted by the Institute of Epidemiology, Disease Control and Research (IEDCR) and the Directorate General of Health Services, 25 wards of DNCC have been identified as most vulnerable to Aedes mosquitoes. In these 25 high-risk wards, a total of 53 campaigns under the "Saturday's Pledge - Let's Keep Our Homes Clean" initiative will be conducted from March to May every Saturday from 8 am to 12 noon.'
Caveat
The source is an announcement made the day before the campaign began, so 53 is the planned count. No source read reports how many of the 53 actually ran.

Sources carrying this claim

  1. BSS — DNCC launches Saturday mosquito control campaign in 25 high-risk wards (state news agency)
Claim 11 clm-83805dd032cf7b3b quantitative
its own survey in mid-June recorded Breteau values from 20 to 73.33 across five high-risk areas
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'During the latest mosquito surveillance conducted by Dhaka North City Corporation between 12 and 16 June, officials found alarming concentrations of larvae at breeding sites... Surveys in five high-risk areas of the city recorded Breteau Index values ranging from 20 to 73.33, with an average BI exceeding 40.'
Caveat
Five areas, not a full ward-by-ward round; the source does not say how the five were chosen, and DNCC's chief health officer is quoted in the same piece saying he does not believe the situation has yet reached a critical stage.

Sources carrying this claim

  1. Prothom Alo — High levels of Aedes larvae in Dhaka, higher outside (media)
Claim 12 clm-01aab604e0df9b14 descriptive
Entomologists say there is no field-level survey to assess whether the control effort works
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Manjur A Chowdhury, former president of the Bangladesh Zoological Society, told The Business Standard: 'There is no field-level survey to assess whether the dengue control efforts are effective. According to our research, less than 10% of mosquitoes are killed after fogging.'
Caveat
The statement dates from October 2024, before Dhaka South began running its own survey. No later source read contradicts it, and none reports an evaluation of the drives either.

Sources carrying this claim

  1. The Business Standard — Are city corporations' anti-mosquito drives effective? (media)
Claim 13 clm-733d210861222524 descriptive
the ward at the top of the index is the ward the crews are sent to, and Dhaka South calls that a survey-based, data-driven strategy rather than routine mosquito control
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'He added that, instead of relying solely on routine mosquito control measures, DSCC is implementing a survey-based, data-driven strategy to ensure rapid and effective interventions in high-risk areas.' The description is the DSCC administrator's own.
Caveat
This is the operator's characterisation of its own practice; nobody outside the corporation has assessed whether the drives follow the ward ranking in the field.

Sources carrying this claim

  1. BSS — DSCC launches crash programme in 27 high-risk wards (state news agency)
Claim 14 clm-bc4e87f4d5ae7dd5 quantitative
Dhaka South's own chief health officer was worried enough in February 2026 to convene a committee — chaired by the waste chief and deliberately excluding health department officials — to establish whether the insecticides kill anything in the field
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Prothom Alo: 'DSCC chief health officer Jahan-e-Ferdous Binte Rahman said she herself is concerned about mosquito infestation around her residence in the Bailey Road area, despite regular spraying. This concern prompted the formation of the committee to evaluate insecticide effectiveness... To ensure neutrality, no health department officials have been included in the committee. Instead, the chief waste management officer of DSCC has been appointed as its head.' The same piece records that laboratory tests show the insecticides effective while field results do not follow.
Caveat
The committee was said to be reporting soon in February 2026; no source read reports its findings.

Sources carrying this claim

  1. Prothom Alo — Mosquitoes not dying despite drives, committee formed (media)
Claim 15 clm-1dc9e2f84e713ae6 descriptive
the national dengue dashboard breaks its case counts down to the two city corporations and no further
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The dashboard's own section headings are the finest geography it offers: 'Division & City corporation wise reported cases from 1 January to till date', 'Affected cases within City corporation from 01 January to till date' and 'Affected cases outside of City corporation from 01 January to till date'. There is no ward-level view, so the daily case data cannot be joined to the ward larval index.
Caveat
Read from the live dashboard on 27 August 2026. A dashboard can gain a view later; the claim describes what it offered when read.

Sources carrying this claim

  1. DGHS — Dengue Dynamic Dashboard for Bangladesh (authority)
Claim 16 clm-3d7d93522c034faf quantitative
a peer-reviewed study of the 2023 outbreak found captured only cases reported in government-approved hospitals, with the true total estimated at four times the reported one
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Open Forum Infectious Diseases, verbatim: 'As the surveillance included only cases reported in government-approved hospitals, we noticed a significant underreporting of cases of dengue. At present, the estimated number of dengue cases will be 4 times greater than the reported number.' The government's own workshop record makes the same point in its own words, recording Prof. Rashedul Islam's statement that current dengue surveillance is hospital-based and his call for disease hotspots to be identified.
Caveat
The four-times estimate is the study's own for the 2023 outbreak nationally; it is not a Dhaka-specific multiplier and should not be applied to a city corporation figure.

Sources carrying this claim

  1. Open Forum Infectious Diseases — The Epidemiologic and Clinical Characteristics of the 2023 Dengue Outbreak in Bangladesh (peer-reviewed)
  2. Local Government Division — Immediate Action Plan to Prevent Dengue Outbreak in Bangladesh, workshop report (authority)
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-26-dhaka-baseline effective 2026-08-26 · created 2026-08-26

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:0476dc2c773d9ad088cb3964bf3f20011efb3b1afd6a4d53de55871e78817e00
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
16
of 16 claims mapped
13
source dossiers
11
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Dhaka South City Corporation and Dhaka North City Corporation, with the Communicable Disease Control programme of the Directorate General of Health Services (DGHS) and the Institute of Epidemiology, Disease Control and Research (IEDCR)
Actor types
city-government, national-government
Funding model
public
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

13 source dossiers

BSS — DSCC launches its own pre-monsoon Aedes larvae survey (state news agency) bssnews.net · 2 linked claims

Open original source ↗

Stable source ID
src-968ce8f31b617f65
Publisher
Name not classified · bssnews.net
Type / language
web-page · language not classified
Published
2026-05-10
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Bangladesh's state news agency on the day DSCC inaugurated the survey. States that DSCC ran a scientific pre-monsoon Aedes larvae survey under its own management for the first time, and gives the method: 2,250 sample houses, 30 from each of the corporation's 75 wards, a 12-day survey by 36 field workers drawn from DSCC and the Communicable Disease Control wing of DGHS, with data collected on KoboToolbox.

Descriptive only — not page/paragraph exact
Claims linked
BSS — DSCC launches crash programme in 27 high-risk wards (state news agency) bssnews.net · 8 linked claims

Open original source ↗

Stable source ID
src-aae73327944e038a
Publisher
Name not classified · bssnews.net
Type / language
web-page · language not classified
Published
2026-06-06
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The results and the response in one piece. Carries the survey dates (12 to 23 May), the four entomological indicators used (Breteau, House, Container and Pupa), 63 of 75 wards above the threshold with 27 highly vulnerable, 281 infested households out of 2,238 visited, 35.23 per cent of them multi-storey, and the five-day crash programme in the 27 high-risk wards from 7 June extending to 36 moderately risky wards the week after. Quotes the DSCC administrator describing a survey-based, data-driven strategy rather than routine mosquito control.

Descriptive only — not page/paragraph exact
Claims linked
The Daily Star — 63 of 75 DSCC wards at dengue risk (media) thedailystar.net · 3 linked claims

Open original source ↗

Stable source ID
src-77dd02cbbf14246a
Publisher
Name not classified · thedailystar.net
Type / language
web-page · language not classified
Published
2026-06-05
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Independent daily reporting the same announcement, made at a DSCC event titled 'Presentation of Pre-Monsoon Aedes Larvae Survey Results and Action Plan'. Confirms the 36-member joint DSCC/DGHS team, the 2,250 households, KoboToolbox, the 63/27 ward split and the crash programme, and adds that the programme is jointly coordinated by DSCC's Health Department and Waste Management Department.

Descriptive only — not page/paragraph exact
Claims linked
The Daily Star — 13 Dhaka wards at high risk, DGHS/IEDCR pre-monsoon survey (media) thedailystar.net · 1 linked claim

Open original source ↗

Stable source ID
src-6bf9d9f1f109306a
Publisher
Name not classified · thedailystar.net
Type / language
web-page · language not classified
Published
2025-06-18
Updated
2025-06-19
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The national version of the same instrument a year earlier: a pre-monsoon survey run jointly by the DGHS Communicable Disease Control programme and IEDCR across 99 wards of the two corporations in February, March and May 2025. Defines the Breteau Index as positive containers per 100 houses inspected and gives 20 as the threshold above which the situation is treated as uncontrollable. Lists the 13 wards that exceeded it with their individual index values, and records that the report urged a year-round larvicidal programme in wards with a high Breteau and House Index.

Descriptive only — not page/paragraph exact
Claims linked
BSS — DNCC launches Saturday mosquito control campaign in 25 high-risk wards (state news agency) bssnews.net · 2 linked claims

Open original source ↗

Stable source ID
src-885b6c6991c3fe6c
Publisher
Name not classified · bssnews.net
Type / language
web-page · language not classified
Published
2026-03-13
Updated
2026-03-14
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The Dhaka North half of the same mechanism. States that IEDCR and DGHS surveys identified 25 DNCC wards as most vulnerable to Aedes mosquitoes, and that 53 'Saturday's Pledge' campaigns would run in those 25 wards from March to May, every Saturday from 8am to noon, jointly by DNCC's Health and Waste Management departments with the corporation's entomologists.

Descriptive only — not page/paragraph exact
Claims linked
Prothom Alo — High levels of Aedes larvae in Dhaka, higher outside (media) en.prothomalo.com · 2 linked claims

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Stable source ID
src-1dea4ab6ca1b292b
Publisher
Name not classified · en.prothomalo.com
Type / language
web-page · language not classified
Published
2026-06-30
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
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No captured content hash
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Open the recorded source note

Independent confirmation of the DSCC 63/27 result and the source for Dhaka North's own surveillance round of 12 to 16 June 2026, which recorded Breteau values from 20 to 73.33 across five high-risk areas with an average above 40. Quotes DNCC's chief health officer. Also carries larval densities from outside Dhaka that are higher than the capital's, which is why the entry does not claim Dhaka is the worst-affected place.

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Claims linked
Prothom Alo — Mosquitoes not dying despite drives, committee formed (media) en.prothomalo.com · 1 linked claim

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Stable source ID
src-f14e67f119bc8f47
Publisher
Name not classified · en.prothomalo.com
Type / language
web-page · language not classified
Published
2026-02-20
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
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No archived copy linked
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Open the recorded source note

The operator auditing itself. DSCC's chief health officer prompted the formation of a committee to establish whether the insecticides actually kill mosquitoes in the field; to keep it neutral, no health department officials sit on it and the chief waste management officer chairs it. Also gives the staffing rule (seven larvicide workers per ward in the morning, six fogging in the afternoon, 1,030 workers in total) and a reporter's two-hour tour of Ward 20 that found none of them.

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Claims linked
The Business Standard — Are city corporations' anti-mosquito drives effective? (media) tbsnews.net · 1 linked claim

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Stable source ID
src-3972ac5119d0c41d
Publisher
Name not classified · tbsnews.net
Type / language
web-page · language not classified
Published
2024-10-16
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
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Open the recorded source note

Independent entomologists on the missing half of the loop. Manjur A Chowdhury, former president of the Bangladesh Zoological Society, states there is no field-level survey to assess whether the dengue control efforts are effective, and that fewer than one in ten mosquitoes die after fogging. GM Saifur Rahman argues the effort lacks centralised data on which areas hold the most Aedes and where patients come from.

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Claims linked
The Business Standard / BSS — Govt's preventive steps help keep dengue situation under control (state news agency) tbsnews.net · 1 linked claim

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Stable source ID
src-f50025e006b4731f
Publisher
Name not classified · tbsnews.net
Type / language
web-page · language not classified
Published
2026-08-16
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
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Open the recorded source note

Currency check, and the most recent confirmation that DSCC ran the pre-monsoon larva survey under its own management for the first time this year. Also records that DNCC's distinctive contribution this season was an awareness campaign built on music, and gives DGHS national case and death totals to 13 August for 2026 against 2025 — national figures, not Dhaka ones.

Descriptive only — not page/paragraph exact
Claims linked
Open Forum Infectious Diseases — The Epidemiologic and Clinical Characteristics of the 2023 Dengue Outbreak in Bangladesh (peer-reviewed) academic.oup.com · 1 linked claim

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Stable source ID
src-695b76b1650e9399
Publisher
Name not classified · academic.oup.com
Type / language
web-page · language not classified
Published
2024-02-01
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
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No archived copy linked
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Peer-reviewed analysis of the 2023 outbreak, used only for what the national case count is and is not. States that because surveillance included only cases reported in government-approved hospitals there was significant underreporting, and that the estimated number of dengue cases is four times greater than the reported number. Date taken from Crossref (issued 2024-02-01; online 2024-02-02) for DOI 10.1093/ofid/ofae066.

Descriptive only — not page/paragraph exact
Claims linked
DGHS — Dengue Dynamic Dashboard for Bangladesh (authority) dashboard.dghs.gov.bd · 1 linked claim

Open original source ↗

Stable source ID
src-67fffd5b9de5baf2
Publisher
Name not classified · dashboard.dghs.gov.bd
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The live national dengue dashboard run by the DGHS Health Emergency Operation Centre and Control Room, updated daily from the dengue press release. Its geography stops at the division and city-corporation level — cases and deaths by division and city corporation, and separate totals for cases inside and outside city corporations — with no ward breakdown, which is why the case data cannot be laid over the ward larval index. A live dashboard states no publication date.

Descriptive only — not page/paragraph exact
Claims linked
Local Government Division — Immediate Action Plan to Prevent Dengue Outbreak in Bangladesh, workshop report (authority) objectstorage.ap-dcc-gazipur-1.oraclecloud15.com · 1 linked claim

Open original source ↗

Stable source ID
src-184b06be238f6027
Publisher
Name not classified · objectstorage.ap-dcc-gazipur-1.oraclecloud15.com
Type / language
pdf · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The government's own record of a multi-stakeholder dengue workshop convened by the Local Government Division under the World Bank-supported Improving Urban Public Health Services Project. Names the gaps in the government's own words: incomplete disease surveillance data limiting timely decision-making, absence of baseline data on vector populations and no sentinel surveillance system, a shortage of trained entomologists, and — from Prof. Rashedul Islam — that current dengue surveillance is hospital-based. Hosted on the ministry's object storage; the document itself states no date, and the year and month in the storage path are an upload path, not a publication date.

Descriptive only — not page/paragraph exact
Claims linked
Gavi VaccinesWork — Bangladesh has a dengue-fighting mobile app (media) gavi.org · background

Open original source ↗

Stable source ID
src-d952ad30420063d4
Publisher
Name not classified · gavi.org
Type / language
web-page · language not classified
Published
2026-04-28
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Carries the DGHS entomologist's statement that the Aedes surveys are conducted in Dhaka at pre-monsoon, monsoon and post-monsoon, which establishes the cadence. Also the honest measure of the separate citizen-science app: Mosquito Alert, rolled out by the research institute icddr,b in September 2025, had 227 participants by mid-April 2026 and its scientist describes the operation as limited in scale for lack of manpower and logistics.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Known limits of this passport
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.

Continue exploring

Compare this project

🇵🇭 Smarter Dengue Early Warning System · Cauayan City The same disease, two instruments: Cauayan forecasts outbreaks from weather, Dhaka counts larvae by ward and sends crews to the worst. 🇧🇷 Rio's Heat Levels: a five-tier extreme-heat protocol · Rio de Janeiro Rio's tiers name what each level obliges; Dhaka's ward index does the same for mosquitoes, which few of its other readings manage. 🇵🇭 Pasig River: Court-Ordered Water Quality Monitoring · Manila Measurement that has to go somewhere: Manila reports to a court every quarter, Dhaka's survey sends crews into named wards.

Explore the wider context

🗑️ Pipes or pennies🏥 Health & care guide🏙️ Dhaka city profile👥 Society projects📖 Air quality index (AQI)📖 Pay-as-you-throw (PAYT)📖 Pneumatic waste collection
📎 Cite this project

1001 Smart Cities (2026). “Pre-Monsoon Aedes Larval Survey and Ward-Targeted Drives” — Dhaka, Bangladesh. The Smart City Atlas. https://1001smartcities.org/projects/dhaka-aedes-larval-surveillance/ (last verified 2026-08-26). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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