A typical scenario: the chicken-rice shop that reopened too fast

This illustrative example case is based on situations commonly seen after floods. It does not describe a real person or business.

Tom runs a small chicken-rice shop in a roadside shophouse in Nakhon Chai Si district. Floodwater stood almost knee-deep inside for several days. His chiller, wooden chopping board, chicken-poaching pot and sauce buckets all sat in murky water that had flowed in from the fields and drainage ditches, in a neighbourhood where some households keep backyard chickens and the sewer drains had overflowed.

When the water receded, Tom hosed the shop with tap water, swept out the mud, wiped the board and counter with a cloth and reopened two days later. Regulars were asking for him, and days without income were hard to bear. The wooden board he used for raw chicken was also the one he used for cucumber and side vegetables, because his second board had been swept away.

A few days later, some regulars mentioned diarrhoea, cramping stomach pain and fever. One was a young child who needed a doctor after frequent loose stools left them exhausted. Nobody could say for sure where it came from: drinking water, food at home, or the shop. But Tom began to wonder whether rinsing with water and a single cloth had been enough, and what more he should do to win back his customers' trust.

This can happen in any flooded kitchen, whether a home, a school canteen or a street-side restaurant, especially where animal farms and sewage are mixed into the floodwater.

The 2026 Nakhon Pathom floods: seven districts, 43,687 households

According to the Department of Disaster Prevention and Mitigation (DDPM) report of 2 October 2026, as published by Bangkok Biz News, seven districts of Nakhon Pathom province were affected: Mueang Nakhon Pathom, Phutthamonthon, Kamphaeng Saen, Nakhon Chai Si, Sam Phran, Bang Len and Don Tum, totalling 43,687 households, with water levels still rising at that time.

Nakhon Pathom borders Bangkok and is an important food-producing province, with livestock farms, vegetable and fruit growers, fresh markets, restaurants and food processing. When flooding is this widespread, the water passing through these areas inevitably carries animal dung, sediment and overflowing wastewater into many homes and food businesses.

This article does not claim a Campylobacter outbreak in Nakhon Pathom; we have no such data. The aim is to help families, restaurant owners, market vendors and canteen managers understand the risk and restore kitchens properly when the water recedes.

What is Campylobacter?

Campylobacter is a group of curved or spiral, S-shaped Gram-negative bacteria. The species that most often makes people ill is Campylobacter jejuni, followed by Campylobacter coli. They live normally in the intestines of poultry such as chickens and ducks, and of other animals including pigs, cattle, sheep and some pets, usually without making the animals sick.

WHO describes Campylobacter as one of the key global causes of diarrhoeal disease and one of the most common bacterial causes of human gastroenteritis. The most frequent route is eating undercooked poultry, or ready-to-eat food cross-contaminated from raw chicken via boards, knives or hands. People can also be infected through unsafe drinking water, unpasteurised milk, and contact with animals or their faeces.

A key feature is that a small number of bacteria can cause illness. A few drops of raw chicken juice on a board later used for fresh vegetables may be enough. On the other hand, Campylobacter dislikes drying and heat and is destroyed by thorough cooking. In cool, damp conditions, however, such as wet boards, dish sponges or standing water in a kitchen, it may survive longer, which is exactly what a kitchen looks like after a flood.

How floods bring Campylobacter into the kitchen

1. Animal dung carried by water. Where there are chicken or pig farms, or backyard animals, floodwater picks up manure and pen runoff and carries it into homes and shops.
2. Overflowing sewage and toilets. Submerged drains and septic tanks release human waste into floodwater and mud.
3. Soaked boards, dishes and counters. Wood and knife-scarred plastic hold bacteria well; a water rinse may leave them behind.
4. Fridges and chillers without power. Chicken and other food thaw over days of outage, and raw meat juices drip onto other shelves.
5. Unsafe drinking and washing water. Wells, groundwater or storage tanks that floodwater entered may be contaminated.
6. Rushing to reopen without disinfecting. Under pressure to cook and sell, cleaning is hurried and one board serves raw and cooked food alike.

Once bacteria are on a board or hands and then pass to food that will not be cooked again, such as fresh vegetables, dipping sauces, papaya salad or plated rice, people who eat it can become ill. That is why CDC and WHO flood clean-up guidance stresses throwing away food that touched floodwater, and cleaning and then sanitising food-contact surfaces and utensils.

Symptoms of Campylobacter food poisoning

The incubation period is usually about 2 to 5 days after exposure but can range from 1 to 10 days, so people often cannot remember what they ate. Common symptoms are:

• Diarrhoea, sometimes with mucus or blood
• Abdominal pain and cramping, at times severe enough to resemble appendicitis
• Fever, headache and body aches
• Nausea, sometimes vomiting
• Exhaustion

Illness typically lasts from a few days to about a week, and most people recover on their own. The most important thing while ill is to replace fluids and salts, because frequent diarrhoea causes dehydration, particularly in young children and older people.

Uncommon complications

In a small number of people, complications can follow the diarrhoea, such as reactive arthritis or Guillain-Barré syndrome, a nerve inflammation that causes muscle weakness. These are rare, but if numbness or limb weakness appears in the weeks after a bout of diarrhoea, see a doctor immediately.

Important: See a doctor for bloody diarrhoea, high fever, severe abdominal pain, vomiting that prevents drinking, signs of dehydration such as little urine, a dry mouth or drowsiness, or symptoms that do not improve within a few days. Go sooner for young children, older people, pregnant women and people with chronic illness. Antibiotic decisions belong to a doctor; do not self-medicate with antibiotics or anti-diarrhoeal drugs. This article is general information, not personal medical advice.

Who is most at risk from Campylobacter after a flood?

• Young children, who dehydrate quickly with diarrhoea and put things in their mouths.
• Older people, whose immunity is lower and who may not feel thirsty even when dehydrated.
• Pregnant women, who should be careful with all foodborne infections.
• People with weakened immunity, such as those on immunosuppressive drugs or chemotherapy, or with uncontrolled HIV.
• Cooks and restaurant staff who handle raw chicken daily and are the first line against cross-contamination.
• Farmers and farm workers cleaning animal pens and livestock areas after the water falls.

Hot spots in kitchens and restaurants after the flood

• Chopping boards and knives, especially cracked wooden boards floodwater has soaked into. Consider replacing them.
• Counters, prep tables and sinks.
• Fridges, chillers and ice trays that lost power or took on water.
• Sponges, hand towels and table cloths, which stay damp and collect bacteria. Discard any that sat in floodwater.
• Ice buckets, sauce containers and food containers.
• Kitchen floors, drains and grease traps where wastewater may have backed up.
• Raw meat stalls in fresh markets, with raw meat, wash water and permanently wet surfaces.
• Fridge handles, taps and switches touched by everyone.

A flooded kitchen may also harbour other food-poisoning germs such as Salmonella, faecal bacteria and diarrhoea-causing viruses, so restoration should be systematic from the start.

The impact on families and food businesses

Health. Days of diarrhoea leave people weak and unable to work. Young children and older people may need hospital care for dehydration, just when everyone is exhausted from restoring their homes.

Income. If customers fall ill after eating, whether or not the shop was really the cause, rumours spread quickly through the community and social media. Income lost during the flood can be followed by weeks of lost customers.

Time. Sick days, or closing again for a full re-clean, cost more time than doing it right the first time.

Reputation. Restaurants, school canteens and factory kitchens that can explain how they cleaned and disinfected after the flood earn a clear advantage in trust.

Scale. A single home kitchen affects one family, but a canteen, a busy food stall or a factory kitchen feeds dozens or hundreds of people every day. One contaminated board or one unwashed chiller in such a place can affect many more people at once, which is why food businesses carry a special responsibility to restore their kitchens methodically before serving again, and why a few extra hours spent on proper cleaning and disinfection are a sound investment.

Why a quick rinse is not enough

Water alone removes mud but does not kill bacteria on surfaces, especially in knife grooves on boards.

One cloth for everything spreads bacteria from floor to board to table.

Keeping soaked wooden boards and sponges. Porous items that absorbed floodwater are very hard to clean fully. Replace them.

Keeping food that touched floodwater. CDC advises discarding food that came into contact with floodwater, food in containers that were not sealed, and refrigerated food left too long without power.

Guesswork bleach. Too strong can irritate and damage utensils; too weak does little. Never mix it with ammonia or toilet cleaners.

Rinsing raw chicken in the sink. A common habit, but splashes spread bacteria around the sink and counter. Thorough cooking is what makes chicken safe.

WHD post-flood disinfection spraying for kitchens and restaurants

World Health Disinfection (WHD) offers a disinfection spraying service by trained technicians. According to the service information, they use spraying and/or ULV (Ultra Low Volume) fine-mist fogging with CHEMGENE HLD4H, a medical-grade disinfectant from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride.

Being straight about efficacy for Campylobacter

According to the product and service information, CHEMGENE is broad-spectrum, covering viruses, bacteria and fungi. Organisms named on the website include Salmonella, another major food-poisoning bacterium, as well as norovirus, SARS-CoV-2 (COVID-19), Human Coronavirus 229E, RSV, H1N1, H5N1, HIV, hand-foot-and-mouth virus, vaccinia virus, mycobacteria and Bordetella pertussis. The service page states 99.99% efficacy.

However, Campylobacter is not on that list, so we do not claim a tested kill result for it. What we can say is that it is a bacterium, within the group the product says it covers, and that WHO and CDC advise cleaning and then disinfecting surfaces contaminated by floodwater. For Campylobacter-specific test data, ask WHD directly.

What kitchen spraying can and cannot do

Spraying reduces germs left on kitchen, storeroom, floor, wall, table and shopfront surfaces after mud removal and cleaning. It suits restaurants, canteens and market stalls preparing to reopen.

Spraying does not make flood-touched food safe; that food must be thrown away. It does not replace thorough cooking, handwashing or separate boards for raw and cooked food. Utensils and food-contact items must be washed and sanitised by food-safe methods, and you should ask the technicians how to treat food-contact surfaces after spraying. Do not assume there is no residue.

The service page lists approvals and endorsements from the Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019, and customers including hospitals, schools, malls, airports, offices, airlines, banks and residential buildings.

Restoring a kitchen after the flood, from discarding food to spraying

1. Throw out unsafe food: anything that touched floodwater, fridge food after a long outage, and dry goods that got wet.
2. Throw out what cannot be cleaned: cracked wooden boards, sponges, cloths and cracked plastic containers.
3. Remove mud and wash. In boots and gloves, wash floors, walls, counters and cabinets with water and detergent, then let them dry.
4. Wash food-contact items with dish soap and clean water, then sanitise them by a method suited to the item, such as hot-water scalding as public health guidance advises.
5. Contact WHD with the kitchen and shop size via LINE @whd268 or phone 065-556-6294.
6. Prepare the area. Store food, ingredients and clean utensils in closed cabinets or remove them.
7. Everyone leaves the sprayed zone, staff and customers alike.
8. Technicians spray and/or ULV-fog all surfaces.
9. Wait for re-entry. About 30 minutes per the service information; follow the technicians' time, ventilate, and clean food-contact surfaces as advised before preparing food.
10. Set new kitchen rules: separate boards for raw and cooked, wash hands after touching raw chicken, and cook poultry thoroughly.

Per the service information, the service includes a free CHEMGENE spray bottle and WELLGIENIC wet tissues, and tax invoices are available.

10 reasons Nakhon Pathom kitchens and restaurants should disinfect after the flood

1. Floods carry dung and sewage into kitchens, sources of food-poisoning bacteria.
2. Reduces residual germs left after a water-only wash.
3. Covers bacteria, viruses and fungi per product information, with Salmonella and norovirus named. See the disinfection service page.
4. ULV mist reaches corners under counters, behind fridges and around drains.
5. Technicians do the work, so staff do not mix chemicals.
6. Reopen quickly, about 30 minutes after spraying per the service information, or as technicians advise.
7. Customer confidence: tell diners the shop was washed and disinfected.
8. Suits school canteens and factory kitchens feeding many people.
9. Approvals and endorsements listed, with further test data on request.
10. Tax invoices for shops and companies. Ask via the WHD disinfection service.

Before and after restoring the kitchen

Example case: a fresh-chicken stall in a Sam Phran market

An illustrative scenario to show planning, not a verified customer review.

Auntie Lek has sold fresh chicken in a Sam Phran district market for over twenty years. Floodwater filled the market for days, leaving concrete stalls and floors coated in mud mixed with overflow from the drains. When it receded, the market committee called every vendor to clean together.

Auntie Lek threw away her old soaked wooden board and bought two new plastic boards in different colours, one for raw chicken and one for blanched offal. She scrubbed her stall with water and detergent and let it dry overnight. The market then hired a disinfection team for walkways, toilets and every stall. No vendors or shoppers were inside during spraying, and everyone returned at the time the technicians gave.

Since reopening, she wears gloves whenever she handles raw chicken, washes her hands before taking money, and has a sign reminding customers to cook chicken thoroughly. None of this guarantees zero bacteria, since raw chicken can carry Campylobacter naturally, but it cuts the cross-contamination added by the flood and by handling at the stall.

Post-flood Campylobacter prevention checklist

Food and water

• Discard all food that touched floodwater and fridge food after a long outage.
• Drink boiled or bottled water until you are sure tap or well water is safe.
• Cook chicken and other poultry thoroughly, with no pink parts.
• Avoid unpasteurised milk.

Kitchen and equipment

• Discard flood-soaked wooden boards, sponges and cloths.
• Wash surfaces with water and detergent first, then disinfect.
• Use separate boards and knives for raw and cooked food.
• Do not rinse raw chicken in the sink.
• Wash hands with soap after raw meat, after the toilet and before cooking.

Health

• Anyone with diarrhoea should not cook for others until recovered.
• Drink enough fluids and oral rehydration salts during diarrhoea.
• See a doctor for bloody stools, high fever or signs of dehydration.
• Numbness or weakness in the weeks after recovery needs urgent medical care.

FAQ: Campylobacter and kitchen disinfection

How is Campylobacter different from Salmonella?
Both are food-poisoning bacteria found in poultry, but they are different organisms. Campylobacter can cause illness from a small dose. Symptoms are very similar; only laboratory tests can tell them apart.

Does CHEMGENE kill Campylobacter?
Campylobacter is not on the product's named list, but it is a bacterium, within the group the product says it covers; Salmonella is on the named list. Ask WHD for organism-specific test data.

After spraying, can we eat food that sat in floodwater?
No. Flood-touched food must be thrown away. Spraying is for surfaces, not food.

Do we need to clean before spraying?
Always. Disinfectant works best on clean surfaces, as CDC advises.

Can we start cooking right after spraying?
Wait for the time the technicians give, about 30 minutes per the service information, ventilate, and clean food-contact surfaces as advised before preparing food.

Should I take anti-diarrhoeal medicine after flood-related diarrhoea?
Do not self-medicate. Drink fluids and rehydration salts, and see a doctor if symptoms are severe or you are in a risk group.

Get your kitchen and restaurant ready to reopen

Mud cleared? Let WHD disinfect kitchens, restaurants, canteens and market stalls in Nakhon Pathom.

See WHD Disinfection Service

Phone 065-556-6294 · LINE @whd268 · worldhealthdisinfection@gmail.com

Related links

• World Health Disinfection spraying service
• CHEMGENE HLD4H disinfectant
• Residential ozone disinfection for musty post-flood air

References

• DDPM flood situation, 2 October 2026, via Bangkok Biz News: bangkokbiznews.com/news/news-update/1254629
• World Health Organization fact sheets (Campylobacter): who.int/news-room/fact-sheets
• CDC Floods: cdc.gov/floods
• CDC Campylobacter: cdc.gov/campylobacter
• Department of Disease Control, Thailand: ddc.moph.go.th