Thermal Fogging Machine in a Subdistrict Dengue Outbreak Response Plan: Who Does What, and Within How Many Hours, with the AIROFOG AT35

When the call about the first dengue case comes in, the difference between a subdistrict with a plan and one without shows within hours. This guide sets out a simple subdistrict-level response plan, separating the roles of local executives, the public health division, the health promoting hospital, village health volunteers, community leaders, schools and support units. It gives a reference timeline that must be adjusted to local health authority guidance, and shows where the AIROFOG AT35 thermal fogging machine fits.

1-minute summary

• The problem: Many subdistricts have willing people but no agreed plan. When a case appears, everyone waits for instructions and the golden hours of disease control slip away.
• The right principle: A response plan must say who commands, who goes to the field, who communicates, who supplies resources, and within what timeframe each task starts. Timeframes follow the Department of Disease Control and the local provincial and district health offices.
• What you get here: A 10-party role table, a reference timeline from preparation to closing the event, a readiness checklist and an after-action review routine.
• Why AIROFOG AT35: A 100% stainless steel, lightweight thermal fogger that works with water- and oil-based chemicals and is certified in Germany and the UK, well suited to spraying around a patient's home and places vehicles cannot reach.
• Next step: Call 065-556-6294 or LINE @whd268 for specifications, a quotation and a demonstration.

48 hours lost waiting for someone to start

(Illustrative scenario) Sunantha is chief administrator of a subdistrict administrative organisation in lower northern Thailand. On a Friday evening the director of the local health promoting hospital calls: a primary school pupil in Village 3 has been diagnosed with dengue. Two days later a second case is reported in the neighbouring village.

Nobody is unwilling to help. The problem is that nobody is sure where to begin. The public health division waits for a written order. Village health volunteers wait for health centre staff to set a time. The subdistrict's thermal fogger has sat in storage since last year and will not start. No one is sure whether the remaining insecticide has expired, and the sick child's school has not been formally told.

By the time the whole team is in the field, almost two days have passed. The village LINE group fills with questions and rumours, some parents keep children home, and at a village meeting the mayor is asked, "What is the subdistrict doing?"

What was missing was not people or goodwill. It was a one-page plan that told everyone in advance what to do and how quickly, and equipment ready the moment it was needed.

Pain points: every hour of delay has a cost

1) Health: mosquitoes do not wait for orders

Dengue is caused by a virus carried by Aedes mosquitoes. Patients usually have several days of high fever, headache, muscle and eye pain, sometimes a rash or bleeding spots, and need close monitoring for shock as the fever falls. Children, older adults, pregnant women and people with chronic illness need extra care. Mosquitoes that bite a patient while the virus is in the blood can pass it to family and neighbours, so breaking the cycle quickly is the heart of control. The same mosquitoes also carry chikungunya and Zika.

2) Budget: a big outbreak costs more than a fast response

When control is slow, cases spread from one village to several, and spraying a few houses becomes spraying a whole subdistrict. Insecticide, fuel, allowances and materials multiply, while affected families lose income caring for the sick.

3) Image and public trust

People remember how fast their local government arrived when the community was in trouble. Speed and order in a crisis are among the most visible achievements an executive can show, and delays are remembered longer than many good deeds combined.

4) Complaints and social media

Rumours about case numbers or deaths move fast in village LINE groups. Without a clear communication lead, wrong information outruns the control team and makes fieldwork harder, for example when residents refuse larval inspections because of a misunderstanding.

5) Staff workload

No plan means duplicated work and constant phone calls. Some homes are inspected twice while some lanes are never visited, and the same few officers spray, answer questions and write reports until they are exhausted.

Why the usual response is too slow

• The plan lives in a binder: Dozens of pages nobody reads cannot be used on a Friday night.
• No named people or deputies: "The public health division is responsible" does not say who, or who covers when that person is away.
• Equipment not ready: An unmaintained thermal fogger that will not start or leaks delays spraying.
• Wrong timing: Spraying at midday for the team's convenience, when thermal fogging should be done in the early morning or evening feeding window in calm air.
• Non-standard fog: Cheap equipment produces uneven fog, drips chemical or burns poorly, reducing results and raising operator risk.
• No checked chemical stock: Unknown balances and expiry dates mean procurement starts only after the case appears.
• No after-sales service: A breakdown mid-outbreak with no technician or parts forces borrowing from neighbours who need their machines too.
• Spraying without larval control: Spraying reduces adult mosquitoes briefly, but without the "3 Keeps" to remove breeding sites, a new generation soon emerges.

Role table: who does what in a subdistrict response plan

This is a general framework for subdistrict administrations and subdistrict municipalities. Structures differ, so adapt it to your area and to the district health office and its Surveillance and Rapid Response Team (SRRT). Technical tasks such as case investigation and diagnosis belong to health services; local government leads vector control, resources and community communication.

Reference timeline: what must happen within how many hours

Important: The timeframes below are planning examples. Always follow current guidance from the Department of Disease Control and your provincial and district health offices. Many Thai areas refer to a principle often called "3-3-1": report a case within a few hours of diagnosis, investigate quickly, and carry out control in the area within about one day. Confirm the exact figures used in your area with your health authority.

Phase 0: Before any case (finish before the season)

• Issue an order naming every role and deputy.
• Build a 24-hour contact list and a team LINE group.
• Test-start every thermal fogger and ULV sprayer and log it.
• Check chemical stock, expiry dates and PPE.
• Prepare notices, household maps and record forms.
• Run a tabletop exercise at least once a year, simulating the first case.

Phase 1: The first hour after notification

• Health centre notifies the local government coordinator through the agreed channel, sharing location only to the level needed for control.
• Coordinator activates the plan in the team LINE group and informs the mayor.
• Public health division checks sprayers and chemicals and calls the spray team.
• Head volunteer mobilises volunteers in the affected village.

Phase 2: Within about 24 hours

• Health services investigate the case, identify risk areas and advise on the control zone.
• Volunteers and residents survey and remove larvae in the patient's home and homes within about 100 metres, and advise on preventing bites.
• Spray team fogs inside and around homes within about 100 metres, in the early morning or evening feeding window, using registered insecticide per the label.
• Headmen and PR announce before spraying without identifying the patient.
• School checks for larvae on site and, where advised, arranges spraying when pupils are not present.

Phase 3: Day 2 to about day 7

• Volunteers repeat larval surveys and report to the health centre.
• Fever finding in the community as health services assign, with referral to a doctor.
• The spray team prepares the repeat round on the schedule set by health authorities. Many areas repeat about one week after the first round to catch mosquitoes emerging from remaining larvae.
• Executives hold a short daily check-in.

Phase 4: Continued surveillance until the event is closed

• Watch for new cases for the period set by health services. A common approach is to wait for no new cases over roughly twice the incubation period, which many areas treat as about 28 days.
• If a new case appears, restart from Phase 1 in that area and widen the zone as advised.
• Keep the 3 Keeps campaign running across the subdistrict.

Phase 5: After closing (within about 2 weeks)

• Hold an after-action review: what worked, what was slow and why.
• Summarise costs, chemicals used and sprayer condition after heavy use.
• Update the plan, contacts and next year's budget, including any extra equipment.

A 12-point readiness checklist executives can run in 10 minutes

1. A current order naming the team and deputies for every role.
2. After-hours numbers for the local government coordinator and the health centre.
3. Every thermal fogger test-started within the past month.
4. At least one backup machine, or a clear borrowing agreement.
5. Enough in-date insecticide for at least one event.
6. Complete PPE for the spray team.
7. At least two operators trained in use and safety.
8. Ready-made loudspeaker and LINE notices.
9. Up-to-date household maps and volunteer roster.
10. Spraying record forms and a chemical ledger.
11. Technician and supplier contacts for breakdowns.
12. A tabletop exercise within the past 12 months.

The one-page plan: what to print and pin on the wall

A response plan only works if people can use it under pressure. Keep the long version for reference, but make a single page that fits on the public health office wall and in the team LINE group. It should contain:

• Activation trigger: "Plan activates when the health centre confirms a dengue case in the subdistrict, or when the district health office requests support."
• Who activates it: The chief administrator, or the named deputy if unavailable, with both phone numbers.
• The 10-party table: One line per party with the named person, deputy and phone.
• First-hour and 24-hour actions: Short bullet lists copied from the timeline above.
• Equipment location: Where the thermal fogger, ULV sprayer, insecticide and PPE are stored, and who holds the keys.
• Communication rule: One spokesperson for public information, no patient names, and ready notices for loudspeaker and LINE.
• Daily check-in: Time and place of the short daily meeting until the event is closed.

One voice to the public

During an outbreak, several people may be tempted to post updates: the mayor, council members, volunteers, headmen. Mixed messages create confusion, and a single careless post can reveal a patient's identity. Agree in advance that one spokesperson publishes official updates, using figures confirmed by health services, and that everyone else shares those posts rather than writing their own. Updates should be short and practical: which villages are being sprayed and when, what residents should do to prepare, how to remove breeding sites and when to see a doctor for fever.

Looking after the spray team

Outbreak work often means several early mornings and evenings in a row. Build rest into the roster, rotate operators, and make sure PPE is worn every time. A tired, poorly protected team makes mistakes, and a sick operator removes capacity exactly when it is needed most. Record hours worked as well, so allowances and future staffing needs can be justified.

The equipment side: AIROFOG AT35 for the first 24 hours

The most urgent field task is adult mosquito control inside and around the patient's home, usually among narrow lanes, raised houses, shrubs and dark corners. That calls for a portable, ready-to-go, durable fogger. The AIROFOG AT35 thermal fogging machine fits this role.

AT35 suits homes, factories, hospitals and public areas, backed by World Health Disinfection Co., Ltd.'s ISO and GMP certification, 100% quality control before delivery, full after-sales service with technicians and spare parts, and compliance with Thai government equipment standards.

For long main roads or wider spraying, add vehicle-mounted government mosquito control equipment such as the GREENFOG F4 ULV cold fogger, or a backpack mosquito sprayer like the SOLO PORT423, with AT35 as the main tool for detailed work around cases.

10 reasons AIROFOG AT35 belongs in your subdistrict response plan

1. Ready for urgent work. A portable mosquito fogger goes straight to the patient's home without waiting for a vehicle.
2. Reaches resting sites. Fog gets under houses, into shrubs and corners that vehicle sprayers miss.
3. 100% stainless steel. Built for consecutive days of use and storage between seasons.
4. Lightweight. A small team can rotate and finish the full radius.
5. Chemical flexibility. Water- or oil-based, following registered products and health authority advice.
6. International certification. Certified in Germany and the UK, useful in procurement documents.
7. Many missions. Beyond dengue, it supports vector control and nuisance pest control with suitably registered insecticides.
8. Many settings. Homes, schools, religious sites, hospitals and public spaces.
9. Technicians and parts. WHD after-sales support lowers the risk of mid-outbreak failure.
10. Justifiable government equipment. Clear specifications, simple acceptance and a direct link to the plan. See the AIROFOG AT35 product page.

Before and after a subdistrict response plan

Procurement tips: let the plan and the equipment move together

General suggestions only; always check procurement rules and your supervising agency's guidance.

• Use the plan as budget justification: A plan stating how many foggers and backups are needed is an argument councils understand.
• Specifications (TOR): Machine type, body material, water- or oil-based capability, portable weight and certificates, written openly and fairly.
• Budget line: Sprayers as capital equipment; insecticide, PPE and materials in operating budget, enough for at least one event.
• Training: Operation, maintenance and safety for main and backup teams, including civil defence volunteers who may help.
• After-sales: Warranty, repair channel, response time and local spare parts.
• Record on acceptance: Log serial numbers and add the new machine to the readiness checklist.

Example field perspective

"Last year it took us almost two days to get everyone in the field. This year we put a one-page plan on the public health office wall and in the team LINE group. When the health centre called, the chief administrator typed two words, 'plan active', and everyone knew their job. Volunteers checked for larvae, the spray team took the fogger we had already tested, and the headman read the prepared notice. It all happened the same day."

(Example field perspective: a composite based on typical subdistrict local government and health centre work, not a quote from a real person.)

Frequently asked questions

1. Are these timeframes official requirements?

No. They are planning examples. Actual timeframes must follow current guidance from the Department of Disease Control and your provincial and district health offices.

2. Must local government wait for health services before spraying?

Coordinate from the start, because health services investigate the case and advise on the control zone. A good plan makes that coordination happen in the first hour, not after days of paperwork.

3. Why repeat spraying?

Spraying reduces adult mosquitoes exposed at that moment, but remaining larvae become new mosquitoes within days, so repeat on the health authority's schedule alongside continuous larval control.

4. Why AT35 as the main tool early on?

Early work focuses on the patient's home and neighbours, full of corners, raised floors and shrubs that a portable thermal fogger reaches well. AT35 is 100% stainless steel, lightweight and works with water- or oil-based chemicals.

5. How many sprayers does a small subdistrict need?

It depends on villages, area and staff. A sound rule is one ready main machine plus at least one backup or a clear borrowing agreement. The WHD team can help assess.

6. How often should we rehearse?

At least once a year before the season, and whenever key people change.

3 next steps

1. Call or LINE for a quotation and specifications: 065-556-6294 or LINE @whd268, with your number of villages, area and current equipment.
2. Request a demonstration and training: See AIROFOG AT35 in action, train main and backup teams, and rehearse the plan at the same time.
3. Budget and procure by the rules: Include it as capital equipment in your plan and budget, then follow the applicable procurement procedure.

Be ready from the first hour

Ask World Health Disinfection about AIROFOG AT35 specifications, quotations and demonstrations.

See AIROFOG AT35 products and prices, click here

Browse the government mosquito and insect control equipment hub

Tel 065-556-6294 · LINE @whd268 · worldhealthdisinfection@gmail.com
World Health Disinfection Co., Ltd., 88 268 Kanlapaphruek Road, Bang Khae, Bangkok 10160

Related links

• Government mosquito and insect control equipment hub
• GREENFOG F4 vehicle-mounted ULV sprayer
• SOLO PORT423 backpack ULV sprayer
• Department of Disease Control, Thailand
• WHO: Dengue and severe dengue

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Keywords: thermal fogging machine, mosquito fogger, mosquito sprayer, ULV cold fogger, government mosquito control equipment, vector control, dengue outbreak response plan, subdistrict, Aedes mosquito, AIROFOG AT35