A typical scenario: a small cut while shovelling mud

This illustrative example case is drawn from situations commonly seen in flooded parts of the Northeast. It does not describe real individuals.

Uncle Saman is in his early sixties and has farmed rice all his life in a sub-district of Nang Rong. He has had diabetes for years and takes his medicine only now and then, because he feels strong. In late September, floodwater poured into the village, filling the space under his stilted house and drowning the rice that was just coming into ear. For days he and his son waded back and forth moving belongings to higher ground, barefoot, because his sandals had been swept away on the first day.

When the water began to fall, a thick layer of brown mud lay under the house. Uncle Saman scooped it out with bare hands and blasted the rest with a pressure washer, sending a fine spray of muddy water into the air. Along the way he stepped on a sliver of bamboo hidden in the mud and got a small cut. He rinsed it with water from the storage jar and kept working.

Two weeks later he developed a high fever, chills, weakness and a cough. His son assumed it was a cold from the rain, but the fever would not come down, so they went to the community hospital. The doctor asked whether he had diabetes and whether he had recently been in contact with mud, then ordered further tests including cultures. Uncle Saman was admitted and treated according to the doctor's plan.

Once he was home, the family began asking: how should we clean a house that still has mud on the walls, floors and belongings? Who in the household needs to be most careful? What can make the home safer? Those are the questions this article answers.

The 2026 Nang Rong floods: rice fields under water, homes submerged for days

According to a report by Manager Online, flooding in Nang Rong district covered 15 sub-districts, beginning on 24 September 2026. At the time of the report, more than 100 houses were still under water, at depths of roughly 80 centimetres to 1 metre, about 20,000 rai of rice fields were submerged, more than 500 households were affected, and officials were watching for a new mass of water flowing in from Nakhon Ratchasima. Across Buriram province, eight districts had flooded, four of which were easing.

What stands out is that the water in Nang Rong did not just cover roads and town streets; it spread across a wide area of paddy land. Water flowing over fields picks up topsoil, sediment, plant debris and animal dung. As it recedes, all of this settles as mud inside homes, under houses, in equipment sheds and around wells, exactly the places families clean with their own hands.

This article does not claim that anyone has caught melioidosis from this particular flood; we have no such information. But because the Northeast is a region where the bacterium occurs naturally in soil, knowing how to protect yourself while clearing mud matters for every family in the area.

What is Burkholderia pseudomallei?

Burkholderia pseudomallei is a rod-shaped Gram-negative bacterium that lives naturally in moist soil and surface water, especially in rice paddies, still water and ground that is often waterlogged. It is widespread across tropical Southeast Asia and northern Australia. Within Thailand, the Northeast reports the most cases.

The bacterium is environmentally tough. It survives in soil and water for long periods and becomes more abundant in the rainy season. Heavy rain and floods can bring bacteria from deeper soil layers up into surface water and mud, increasing the chance of human contact. WHO and research from the region agree that cases tend to rise during the wet season and after heavy rain or storms.

The disease it causes, melioidosis, takes many forms, from a localised skin abscess to pneumonia, abscesses in internal organs and bloodstream infection. Some doctors call it "the great mimicker" because it can resemble so many other illnesses. Diagnosis depends on laboratory tests, especially bacterial culture.

Importantly, melioidosis is generally not spread from person to person in everyday life. People become ill from contact with the bacterium in the environment, not from being near a patient.

How Burkholderia pseudomallei enters the body during floods

There are three main routes, and floods make all three more likely.

1. Through breaks in the skin. This is a common route: cuts from sharp objects, scrapes, chronic wounds or cracked heels. When a wound touches contaminated mud or water, the bacterium can get in. Wading barefoot and scooping mud with bare hands raise the risk considerably.
2. By breathing it in. Inhaling contaminated water droplets or dust. Infections by this route have been reported around storms and heavy rain. During clean-up, blasting mud with a high-pressure hose so that muddy spray fills the air is something to avoid or protect yourself against.
3. By swallowing it. Drinking water that has not been boiled or properly treated, such as shallow wells, groundwater or village water supplies whose systems may have been affected by the flood.

After infection, the incubation period is usually about 1 to 21 days. In some people, however, the bacterium can lie dormant for months or even years and cause illness later when immunity drops. Anyone who has waded through floodwater or cleared mud and later develops a fever should always tell the doctor about that soil and water contact.

Symptoms of melioidosis

Symptoms depend on how the bacterium entered and which organs it reaches. Common patterns include:

• High fever, chills and exhaustion, seen in nearly every form.
• Lung involvement: cough, chest pain, breathlessness and pneumonia, which is a frequent presentation.
• Skin abscesses or ulcers at the entry point, wounds that do not heal normally, with swelling, redness or pus.
• Abscesses in internal organs such as the liver, spleen or prostate, causing abdominal or flank pain or urinary problems.
• Joint and bone pain if the infection settles there.
• Bloodstream infection: high fever with drowsiness, low blood pressure and rapid breathing, a medical emergency.

Because it can look like influenza, ordinary pneumonia, tuberculosis or even leptospirosis, which is also common after floods, telling the doctor that you have diabetes and have recently waded in floodwater or cleared mud helps them choose the right tests.

Important: If you have a high fever, chills, cough, breathlessness, a wound that will not heal or an abscess after contact with floodwater or mud, especially if you have diabetes or kidney disease, see a doctor promptly. Do not self-medicate. Diagnosis and treatment of melioidosis must be managed by a doctor and the treatment course is often long. This article is general information, not personal medical advice.

Who is most at risk from Burkholderia pseudomallei?

• People with diabetes, the most important risk factor in the medical literature, particularly when blood sugar is poorly controlled.
• People with chronic kidney disease or reduced kidney function.
• Heavy drinkers and people with liver disease.
• People with chronic lung disease and those with thalassaemia.
• People with weakened immunity, for example on long-term steroids or immunosuppressive drugs.
• Farmers and others who work with soil and water, especially rice farmers returning to their fields to inspect flood damage.
• Volunteers and helpers who handle mud for days on end.

Healthy people can be infected too, but usually become less seriously ill. Anyone in the groups above should avoid direct contact with mud and, where possible, let fitter household members wearing full protection do the work.

Where post-flood mud hides in a rural home

• The space under a stilted house, an earth or concrete floor used for sitting, working and storage.
• Ground-floor kitchens, water jars, food cabinets and chopping boards.
• Toilets and septic tanks, where sewage may have backed up and mixed with field mud.
• Sheds holding tractors, pumps and farm tools.
• Rice stores and sacks that sat in water.
• Cattle and buffalo pens and chicken coops, with animal dung mixed in.
• Shallow wells and rainwater jars that floodwater flowed into.

This mud may contain more than Burkholderia pseudomallei: sewage and animal bacteria, Leptospira (the cause of leptospirosis) and mould spores that will grow on damp walls within days. Restoring a home means thinking about several groups of germs at once.

What farming families have to carry

Health. Melioidosis usually means a hospital stay and a long course of treatment, with follow-up visits long after discharge.

Income. About 20,000 rai of flooded rice in Nang Rong means a year's income at risk for many families. If the main worker also falls ill, the burden doubles.

Time. After the water falls, everyone rushes to restore house and field, and protection is skipped in the hurry, even though a few minutes to pull on boots and gloves can cut the risk a great deal.

Family. Older relatives with diabetes are often home the most and keen to help. Agreeing that lower-risk family members handle the mud is a practical form of care.

Why the usual way of clearing mud can increase the risk

Bare hands and bare feet. A familiar habit, and a direct route into small wounds you may not even know you have.

High-pressure washing without protection. Fast, but it throws muddy droplets into the air. If you must use it, wear a mask and eye protection and avoid enclosed, airless spaces.

Rinsing wounds with jar water. Wounds should be washed with clean water and soap, then covered.

Washing without disinfecting. Water removes mud, but damp surfaces can still carry bacteria. CDC and WHO advise cleaning first and then disinfecting surfaces that floodwater touched.

Guesswork bleach. Too strong and the fumes irritate the lungs; too weak and it does little. Never mix bleach with toilet cleaners or ammonia.

Thinking spraying replaces washing. A common misconception. No disinfectant reaches germs sealed under a layer of mud. Remove the mud first, every time.

WHD post-flood disinfection spraying and Burkholderia pseudomallei

World Health Disinfection (WHD) provides a disinfection spraying service carried out 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 this organism

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

However, Burkholderia pseudomallei 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, which falls within the bacteria group the product says it covers, and that WHO and CDC advise cleaning and then disinfecting surfaces contaminated by floodwater. If you need test data for Burkholderia pseudomallei specifically, ask WHD directly.

What spraying can and cannot do

Spraying is suited to indoor surfaces that have already been cleared of mud: floors, walls, kitchens, bathrooms, concrete under-house areas, classrooms and offices. It reduces germs left on those surfaces after washing.

Spraying cannot remove a bacterium that lives naturally in the soil of paddy fields or earthen yards. It is part of the Isan environment, so protection when working in fields is always needed. Spraying also does not treat anyone already infected. Anyone with fever must see a doctor.

The service page lists approvals and endorsements from the Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019.

Restoring a home after the flood: from mud removal to spraying

1. Protect yourself first. Rubber boots, thick rubber gloves, long sleeves and trousers, a mask, and eye protection if hosing. Cover every wound with a waterproof dressing. People with diabetes or kidney disease should avoid handling mud directly.
2. Remove mud and ruined items. Shovel out as much mud as possible and discard food and porous items that cannot be cleaned.
3. Wash with water and detergent. Clean floors, walls and furniture, keep high-pressure spray to a minimum, then let everything dry with good airflow.
4. Contact WHD with the size and type of building via LINE @whd268 or phone 065-556-6294.
5. Prepare the area. Store food, dishes and personal items in closed containers.
6. Everyone leaves the sprayed zone during application, pets included.
7. Technicians spray and/or ULV-fog indoor surfaces.
8. Wait for re-entry. The service information says about 30 minutes before normal use; follow the technicians' stated time and open windows.
9. Look after yourself afterwards. Shower with soap, wash muddy clothes separately, clean any wound with clean water and watch for symptoms.

According to the service information, WHD serves hospitals, schools, shopping malls, airports, offices, airlines, banks and residential buildings, offers a free CHEMGENE spray bottle and WELLGIENIC wet tissues with the service, and issues tax invoices.

10 reasons to disinfect after clearing mud in Nang Rong

1. Paddy mud brings several germ groups indoors: soil bacteria, sewage and animal dung.
2. Cuts down residual germs on washed surfaces that water alone does not fully address.
3. Covers bacteria, viruses and fungi according to product information. See the disinfection service page.
4. Keeps family members away from chemicals, especially older relatives with diabetes.
5. ULV mist reaches corners under cabinets, behind water jars and in under-house nooks.
6. Trained technicians, no guessing at dilutions.
7. Quick return: about 30 minutes per the service information, or as technicians advise.
8. Ideal for shared buildings such as schools, community halls, temples and health centres before reopening.
9. Approvals and endorsements listed on the website, with further test data available on request.
10. Tax invoices for local administrations, municipalities, schools and companies. Ask via the WHD disinfection service.

Before and after restoring the home

Example case: a sub-district school in Nang Rong

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

Director Wichai runs a primary school in Nang Rong. Floodwater filled the ground-floor classrooms and turned the playing field into a lake. When it receded, thick mud coated the classrooms, library and canteen, and teachers wanted it gone before term resumed.

He set simple rules: everyone working wears boots and gloves; anyone with a wound or diabetes takes other jobs; no high-pressure hosing in closed rooms. Once the mud was out and the building had dried, the school booked a disinfection team for classrooms, canteen and toilets. Nobody stayed inside during spraying, and staff returned at the time the technicians gave.

Before reopening, the school told parents that children should not play in flooded fields or mud, should always wear shoes, and that anyone at home with a fever after wading should see a doctor. This does not remove the bacterium from the soil around the school, but it leaves the buildings cleaner and everyone better prepared.

Melioidosis prevention checklist after the flood

Before cleaning

• Rubber boots, rubber gloves, long sleeves and trousers.
• Cover all wounds with waterproof dressings.
• People with diabetes, kidney or lung disease or weak immunity avoid direct mud contact.
• Have clean water and soap ready for hands and wounds.

While cleaning

• Avoid high-pressure spraying that aerosolises mud, or wear a mask and goggles.
• Keep doors and windows open.
• Drink boiled or bottled water.
• Wash any new wound immediately with clean water and soap and cover it.

After cleaning and spraying

• Shower with soap; wash muddy clothes separately.
• Clean and disinfect boots and gloves.
• Throw away food that touched floodwater; check jars and wells before use.
• People with diabetes keep blood sugar under control as their doctor advises.
• Fever in the weeks after mud contact means a doctor visit, mentioning the flood exposure.

FAQ: Burkholderia pseudomallei and disinfection spraying

Can melioidosis spread from person to person?
Generally not in everyday life. People are infected from soil and water through wounds, inhalation or swallowing.

Will spraying the house remove the bacterium from the fields?
No. Burkholderia pseudomallei lives naturally in soil. Spraying is for washed indoor surfaces; working in fields still requires boots and covered wounds.

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

Must the mud be cleared first?
Always. Disinfectant cannot reach germs under mud.

Do we leave the house during spraying?
Yes. Everyone and pets leave the sprayed zone and return at the time technicians give, about 30 minutes per the service information. Do not assume there is no residue; store food and dishes before spraying.

I have diabetes and a fever after cleaning. What should I do?
See a doctor promptly, mention your diabetes and recent flood or mud contact, and do not self-medicate.

Mud cleared? Let WHD disinfect your indoor surfaces

For homes, schools, temples, community halls and public offices in Nang Rong and across Buriram.

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

• Manager Online, Nang Rong, Buriram flood report (flooding from 24 September 2026): mgronline.com/local/detail/9690000095727
• World Health Organization fact sheets: who.int/news-room/fact-sheets
• CDC Floods: cdc.gov/floods
• CDC Melioidosis: cdc.gov/melioidosis
• Department of Disease Control, Thailand: ddc.moph.go.th