A Story From the Field: The Week Uncle Somsak Wouldn't See a Doctor

Along the Mae Klong River in Photharam district, Ratchaburi, the water had only just gone down after flooding the riverside community for almost two weeks. Uncle Somsak, in his late sixties, started shoveling mud out of his house on the very first day. He did it in flip-flops, because he found rubber boots hot and awkward. Along the way, a shard of broken tile cut his foot. It was a small wound, and he paid it no attention.

Five days later he developed a high fever, a pounding headache and such pain in his calves that he could barely walk. His wife urged him to see a doctor, but he was convinced it was an ordinary cold from working too hard in the sun. He took fever tablets and went to bed. It was only when his daughter Nuch, who works in Ratchaburi town, came home to visit and saw how unwell he was that he was taken to hospital. The doctor suspected leptospirosis and started treatment straight away. Fortunately, he got there in time.

In the same house, Uncle Somsak's five-year-old grandson had begun to develop an itchy rash on his legs, and his wife was coughing and sneezing every morning after moving back into a bedroom where black mold spots were appearing on the wall. Nuch started asking herself what else the family should be doing, beyond repairing the house, to make sure nobody else fell ill.

A story like this could happen in any home in Photharam, Ban Pong, Damnoen Saduak or anywhere along the Mae Klong in 2026, because the period after the water recedes is exactly when many germs are still lingering in and around the house.

The Diseases That Follow Floods

The information in this section is general prevention guidance, not a medical diagnosis. If you have unusual symptoms, see a doctor, and follow advice from Thailand's Department of Disease Control and Department of Health.

1. Leptospirosis

Cause: bacteria shed in the urine of rats and some other animals, which mix into floodwater, standing water and mud.

How it spreads: the bacteria enter through cuts, scrapes or skin that has softened from long soaking, as well as through the eyes, nose and mouth.

Symptoms to watch for: sudden high fever, headache, muscle pain (especially in the calves) and red eyes. If these appear after wading through water or mud, see a doctor promptly and mention your exposure.

Prevention: wear rubber boots and gloves whenever you wade through water or handle mud, cover wounds completely, wash with clean water and soap after work, and remove rubbish and food scraps that attract rats.

2. Diarrhea and other gut infections

Cause: bacteria, viruses and parasites from sewage and overflowing toilets that contaminate drinking water, food, dishes and hands.

Symptoms: repeated loose stools, stomach cramps, nausea and vomiting, sometimes with fever. Young children and older people are at particular risk of dehydration.

Prevention: drink boiled or bottled water, throw away any food that touched floodwater, wash and disinfect dishes, counters and refrigerators, and wash hands with soap before eating and after using the toilet.

3. Skin infections and "water-rotted" feet

Cause: skin that soaks in dirty water for long periods softens and becomes easily infected by bacteria or fungi. Contact with strong cleaning chemicals adds to the problem.

Symptoms: red, itchy rashes, peeling skin, soggy skin between the toes, and sometimes pustules or inflamed sores.

Prevention: avoid soaking for long periods, dry your feet thoroughly every time, wear gloves when using cleaning products, and wash clothes and bedsheets well and dry them completely in the sun.

4. Mold allergies and asthma

Cause: moisture trapped in walls, ceilings, mattresses and furniture lets mold grow and release spores into the air.

Symptoms: blocked or runny nose, sneezing, coughing and itchy eyes. People with asthma may suffer attacks.

Prevention: dry the house as quickly as possible, discard heavily moldy materials, wear a mask when cleaning moldy areas, and remove airborne spores with professional ozone treatment.

5. Mosquito-borne diseases

Water left standing in containers, old tires and hollows around the house after a flood becomes a breeding ground for Aedes mosquitoes, which carry dengue fever. Tip out containers, remove standing water, and consider our mosquito spraying service around the house.

Why a House That Looks Clean Can Still Make People Sick

• Germs hide in corners and crevices: under cabinets, behind beds, around door frames and in drains, where ordinary washing does not reach.
• Mold spores float in the air. Wiping walls does nothing about spores already drifting around the room.
• Moisture remains in walls and floors, allowing mold to grow back.
• Bleach alone is not enough. It only disinfects what it touches, and its fumes irritate the airways.
• Air fresheners simply mask the smell without removing its source.

That is why, even after all the mud was cleared from Uncle Somsak's house, his wife was still coughing every morning and his grandson still had an itchy rash.

It is easy to understand why people stop at "visibly clean." After days of hard physical work, a house without mud feels like a victory. But many of the organisms that cause illness after floods are invisible, and they live in exactly the places that are hardest to reach. A good recovery plan treats the house as a health environment, not just as a cleaning job.

Think about how a typical day unfolds in a recovering home. Someone wipes the kitchen counter with a cloth that was used on the floor earlier. A child sits on a rug that dried out but was never washed. An older relative naps in a bedroom where the lower wall is still damp behind the wardrobe. Each of these moments is a small opportunity for germs or spores to reach a person. Professional fogging and ozone treatment reduce the number of those opportunities across the whole house at once, so that the everyday habits of a busy family carry far less risk.

How Disinfection Fogging and Ozone Treatment Reduce the Risk

Disinfection fogging and ozone treatment do not treat disease. What they do is reduce germs and spores in the home environment, which is where many infections start. They work alongside personal protection such as rubber boots and handwashing, not instead of it.

Fine-mist fogging with Chemgene HLD4H

WHD's disinfection fogging service uses CHEMGENE HLD4H, a high-level disinfectant used in healthcare settings. It is applied as a very fine mist that spreads over every surface, reaching corners, the undersides of furniture, kitchens and bathrooms, and helping reduce bacteria and viruses on the surfaces your family touches every day.

Ozone treatment for mold spores and musty odors

Our ozone treatment service uses equipment such as the Master Ozone Generator. Ozone permeates every space in the room, helping destroy airborne mold spores and bacteria and breaking down musty odors. That helps reduce allergy and asthma triggers in the home. After ventilation, ozone reverts to oxygen.

Our service process

1. Site survey: water level, mold spots, smelly rooms, and any vulnerable household members.
2. Clean-up and self-protection advice so the family can do their part safely.
3. Chemgene fogging in every room, with extra attention to kitchens, bathrooms and bedrooms.
4. Ozone treatment matched to the house size and severity of mold.
5. Ventilation until the ozone has fully dissipated.
6. Re-check and practical hygiene advice for the home.

A Three-Layer Family Prevention Plan After the Flood

Layer 1: Protect yourself

• Rubber boots, rubber gloves and a mask every time you clean.
• Waterproof plasters on any cuts; wash thoroughly after work.
• Drink clean water and eat freshly cooked food.

Layer 2: Manage the house

• Clear all the mud and throw away heavily contaminated items.
• Dry the house quickly and keep it ventilated.
• Have professionals carry out disinfection fogging and ozone treatment to deal with germs in corners and in the air.

Layer 3: Watch for symptoms

• Look out for fever, calf pain, diarrhea, rashes and breathlessness in everyone at home.
• See a doctor at once if symptoms appear, and mention flood exposure.
• Take special care of vulnerable people: children, older adults, pregnant women and those with chronic conditions.

Read more about residential ozone disinfection.

Warning Signs That Need a Doctor Right Away

Many people, like Uncle Somsak, assume that symptoms after a flood are just tiredness or a common cold. The following should never be left to "wait and see":

• High fever with severe muscle pain, especially in the calves, or red eyes, after wading through water or mud.
• Passing much less urine than usual, or yellowing of the skin or eyes.
• Repeated diarrhea causing weakness or a dry mouth, or blood in the stool.
• A young child who is drowsy, refuses to feed or is passing little urine.
• A wound that becomes swollen, red, hot or pus-filled, or is accompanied by fever.
• Breathlessness, wheezing, or an inhaler that is no longer helping.
• Persistent high fever for several days with small red spots on the skin, which may be linked to dengue.

When you see the doctor, say that you recently waded through floodwater or cleaned a flooded home. This information helps the doctor reach a diagnosis faster.

Kitchen and Bathroom: The Highest-Risk Rooms in the House

The kitchen and bathroom are where gut infections spread most easily after a flood. Sewage can back up through the drains here, and these are the rooms where the family handles food and water every day.

• Throw away all food that touched floodwater, including dry goods in bags or cardboard boxes.
• Check refrigerators that were submerged or without power for a long time; discard spoiled food and disinfect the inside.
• Wash dishes with detergent, then scald them with boiling water or disinfect before use.
• Scrub counters, sinks and chopping boards, then wipe with Chemgene HLD4H spray.
• Check drains and toilets; if they are not flowing properly, fix them before use.
• If you use village piped water or well water, wait for local authorities to confirm it is safe before drinking it.

Children's toys deserve a mention here too. Plastic toys that touched floodwater can be washed and disinfected; soft toys that were soaked are usually best thrown away, however much they are loved. Young children put their hands and toys in their mouths constantly, which makes them one of the most exposed groups after a flood.

Caring for the Most Vulnerable Members of the Family

Every household has people who are more at risk than others after a flood. Planning around them makes a real difference.

Young children

Children crawl on floors, play in puddles and put their hands in their mouths. Keep them away from the house while mud is being cleared, and only bring them back once floors and surfaces have been cleaned and disinfected. Watch closely for diarrhea and signs of dehydration, such as fewer wet nappies, a dry mouth or unusual sleepiness. Wash their hands often, especially before meals.

Older adults

Older relatives may have weaker immunity, chronic illnesses or reduced sensation in their feet, which means small wounds can go unnoticed, just as Uncle Somsak's did. Encourage them to let younger family members do the heavy, wet work. If they insist on helping, make sure they wear boots and gloves and check their feet at the end of each day.

People with asthma or allergies

Mold spores and dust from dried mud are common triggers. People with asthma should avoid cleaning moldy areas themselves, keep their medication close at hand, and stay away while ozone treatment and ventilation are under way. Returning to a home where airborne spores and musty odors have been reduced can make a noticeable difference to how well they sleep and breathe.

Pregnant women and people with chronic conditions

Pregnant women, people with diabetes, kidney disease or weakened immune systems should take extra precautions, avoid direct contact with floodwater and mud where possible, and speak to their doctor promptly about any fever or infection.

How Long Does the Risk Last?

There is no single answer, because it depends on how long the water stood, how quickly the house dries and the weather that follows. As a general guide, the first two to three weeks after the water recedes are the period to watch most closely for infections linked to mud and water, such as leptospirosis and diarrhea. Mold-related problems can continue for much longer if walls and furniture stay damp, sometimes reappearing with the next humid spell. Mosquito numbers can rise for several weeks as long as standing water remains around the house. Combining a thorough clean, professional disinfection and ozone treatment, good ventilation and simple daily habits helps shorten that risk period for your family.

Why Riverside Communities Along the Mae Klong Need Extra Care

Communities along the Mae Klong in Photharam have lived with the river for generations, and many families know how to cope with rising water. But a long flood brings specific challenges. Houses close to the bank often sit in water longer than those further inland, so walls and floors absorb more moisture. Many homes have ground floors used for storage, workshops or small shops, which collect mud and debris. Farmland and livestock nearby mean the floodwater may carry more organic matter and animal waste. And older relatives, who are more vulnerable to infection, often live with the family.

None of this is cause for panic. It simply means that the post-flood period deserves a bit more care than an ordinary spring clean: protection while working, a thorough drying-out, professional disinfection and ozone treatment where needed, and close attention to anyone in the household who starts to feel unwell. Neighbors can help each other too, by sharing boots and gloves, checking on older residents who live alone, and reminding one another that a fever after the flood is a reason to see a doctor, not to wait.

10 Reasons Families in Photharam Choose WHD After the Flood

1. Fewer germs on surfaces throughout the house with fine-mist disinfection fogging.
2. Reaches the corners where germs hide: under cabinets, behind beds, in drains.
3. Medical-grade disinfectant: Chemgene HLD4H.
4. Fewer airborne mold spores with ozone treatment, reducing allergy triggers.
5. Musty odor removed at the source.
6. No residue. See ozone for odors and chemical residue.
7. Care for vulnerable family members: we plan the work so children and older adults stay safe.
8. Mosquito control to reduce dengue-carrying Aedes mosquitoes with our mosquito spraying service.
9. Dust mite removal for musty mattresses with our dust mite removal service.
10. Practical hygiene advice your family can keep using.

Before and After

What Families Tell Us (Example Scenario)

"After Dad got sick, we became much more serious about hygiene at home. We had the team fog and ozone the whole house. They explained that Mum and my nephew needed to stay with relatives first, and they also gave us advice about rubber boots and handwashing. The musty smell in the bedroom is mostly gone now, and Mum hardly coughs in the mornings anymore."

— Daughter of a homeowner on the Mae Klong, Photharam (illustrative scenario based on field work)

Frequently Asked Questions

Q: If the house is disinfected, does that mean we cannot get leptospirosis?
A: Disinfection reduces germs in the home, but the main leptospirosis risk comes from wading through water and mud with open wounds. Protect yourself with boots and gloves as well, and see a doctor if symptoms appear.

Q: How does ozone help with allergies?
A: Ozone helps reduce airborne mold spores and musty odors, which are allergy triggers. It must be carried out with nobody in the house, and the house must be fully ventilated before anyone returns.

Q: When can someone with asthma return home?
A: After the full ventilation period our team specifies. If you are still concerned, check with the person's doctor.

Q: What should we do with kitchen dishes?
A: Wash them with detergent and clean water, then disinfect before use. Plastic or wooden items that soaked in sewage for a long time are best discarded.

Q: When should we book the service after the water recedes?
A: Once the mud is cleared and the house has dried to a reasonable level. Our team will help you judge when it is ready.

Q: Do you serve Photharam and nearby districts?
A: Call 065-556-6294 or message LINE @whd268 to check service areas and book a survey.

Protect the People You Love, Starting With a Clean, Safe Home

Families in Photharam, Ban Pong and along the Mae Klong: book a WHD survey today.

View Disinfection Service – Click Here

Book Ozone Treatment – Click Here

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

Related Links

• Residential ozone disinfection
• Chemgene HLD4H disinfectant spray 750ml
• Mosquito spraying service
• All articles

Health reference: World Health Organization (WHO): Floods fact sheet · Thailand Department of Disease Control · Thailand Department of Health