Last updated: 8 Oct 2026 | 7 Views |
When floodwater rose in the Soi Samakkhi canal-side community behind Patrangsit Hospital (รพ.แพทย์รังสิต), Khu Khot Subdistrict, Lam Luk Ka District, Pathum Thani, in late September 2026, the problem was never only a road that cars could not use. It was about homes where bedridden patients, elderly parents and small children live under one roof. When the water finally drains away, what stays behind is mud, sewage residue, damp walls and a long list of flood-borne germs. This guide summarises what the news reported, explains at least eight germs commonly linked to floods in canal communities, and shows why thorough cleaning followed by a professional disinfection spraying service helps families in Khu Khot recover more safely, especially when someone at home has a weak immune system.
According to a report by Ban Muang newspaper dated 26 September 2026, the Soi Samakkhi community, a canal-side neighbourhood located behind Patrangsit Hospital in Khu Khot Subdistrict, Lam Luk Ka District, Pathum Thani Province, was hit after two consecutive days of heavy rain. The water kept rising until cars could no longer pass through. The community has more than 10 bedridden patients, and village health volunteers (known in Thailand as Or Sor Mor) appealed for emergency boats so that patients could be reached and moved if necessary.
At the national level, according to Department of Disaster Prevention and Mitigation (DDPM) data published by the Government Public Relations Department, as of 06:00 on 7 October 2026 flooding covered 27 provinces plus Bangkok, 123 districts and 984 subdistricts, affecting 1,154,875 households, or more than 3.1 million people. These figures change daily, so readers should follow the latest announcements from local authorities.
Sources: Ban Muang (26 September 2026) and the Government Public Relations Department citing DDPM (7 October 2026). Full links are in the references. This article does not add water depths or household counts that are not in the original reports.
Note: the following is a typical scenario written from situations commonly seen after floods in canal communities. It is not the account of any real person in the Soi Samakkhi community.
Nok is in her forties and has cared for her eighty-year-old mother, who has been bedridden for several years, in a half-wood, half-concrete house beside a canal behind a hospital in the Khu Khot area. Two days of nonstop rain pushed canal water slowly into the lane. What began as a wet front step became water too high for a patient's wheelchair. The car that would normally take her mother to hospital could not enter the lane. The only real help came from rescue boats and the coordination of the local health volunteers.
When the water started to recede, Nok came back to find mud caked on the wheels and legs of the adjustable patient bed. A spare air mattress stored on the floor was soaked. The bin for used adult diapers had tipped over and floated around the room. The house smelled musty, mixed with the sour smell of stagnant water. A clear tide line ran across the lower wooden walls, and within a few days small black spots began appearing in the corners. Her first question was not how to repair the house. It was: "When can I bring my mother back to sleep in this room without her getting an infection?"
That question is the heart of this article. Bedridden patients often have pressure sores, urinary catheters or feeding tubes. Their bodies offer germs more ways in than a healthy adult. Making a home merely look clean is not enough. The goal is a home that is clean and systematically treated to reduce germs on surfaces before the patient returns.
Canal communities have features that make each flood carry more germs into homes than in many other neighbourhoods. First, canal water during heavy rain receives runoff from houses, food stalls and drains. When it spills into a lane, it brings sewage from pipes and septic tanks with it. Second, many canal-side homes sit low, so ground floors and the space beneath raised houses stay wet for longer, and the trapped moisture lets mould grow quickly. Third, when vehicles cannot get in, rubbish collection and the removal of damaged belongings are delayed. Wet waste left for days feeds rats, flies and bacteria.
A fourth factor is especially important for Soi Samakkhi: more than 10 bedridden patients, according to the news report. Homes caring for bedridden patients usually hold infectious waste such as adult diapers, wound dressings, catheters and gloves. When flooded, this waste can spread across a room. Caregivers also have to wade in and out repeatedly to fetch medicine, food and clean water, which means they may carry floodwater germs back into the patient's room without realising it.
For these reasons, recovering a home in Khu Khot after the water recedes should follow a clear sequence: switch off electricity, remove mud, wash with clean water and detergent, dry, then disinfect high-risk areas, always starting with the room the patient will use first.
The information below is general public-health knowledge about germs commonly found after floods in canal communities. It is not a test result from this specific area and it is not treatment advice. If anyone at home feels unwell, see a doctor or contact the nearest subdistrict health-promoting hospital promptly.
How floodwater spreads it: rats living along canals and in rubbish piles flee rising water into houses, and bacteria in their urine mix into standing water and mud. Where it hides after the water recedes: puddles under raised houses, wet mud on paths, kitchen corners and stacked belongings. Symptoms and who is at risk: sudden high fever, headache, muscle pain especially in the calves, and red eyes. People who wade for long periods or have cuts on their feet are most at risk, which makes caregivers who go in and out repeatedly an important group. Prevention: wear rubber boots and gloves, wash feet with soap every time, and if fever follows wading, see a doctor and mention the floodwater exposure.
How floodwater spreads it: canal water overflowing into the lane carries sewage from drains and septic tanks into homes. Where it hides: bathroom floors, kitchen counters, food containers, the legs of patient beds and grab rails. Symptoms and who is at risk: diarrhoea and stomach cramps; some types cause bloody diarrhoea. Young children and older adults can become dehydrated, and patients with urinary catheters may face a higher risk of urinary tract infection. Prevention: wash hands with soap, throw away food touched by floodwater, and clean then disinfect food-contact surfaces.
How floodwater spreads it: it travels in human and animal waste and in food that spoiled while the fridge was without power for days. Where it hides: fridges, freezers, chopping boards, sinks and dishes left on the floor. Symptoms and who is at risk: fever, diarrhoea, abdominal pain and nausea; older and bedridden people may be more severely affected. Prevention: discard any food you are unsure about and clean the fridge and utensils thoroughly before reuse.
How floodwater spreads it: through hands contaminated with faeces and unsafe drinking water, both common when toilets cannot be used and tap water is disrupted. Where it hides: bathroom door handles, taps, water scoops and stored water buckets. Symptoms and who is at risk: diarrhoea with mucus or blood, straining and fever; young children are at higher risk. Prevention: use bottled or boiled water, and wash hands after using the toilet and after changing a patient's diaper.
How floodwater spreads them: these viruses pass easily through water, food and contaminated surfaces, and spread faster when several families share temporary shelter. Where they hide: frequently touched surfaces such as stair rails, dining tables, remote controls and toys. Symptoms and who is at risk: vomiting and sudden diarrhoea; rotavirus is common in young children, while norovirus can quickly dehydrate older adults. Prevention: wash hands with soap and water, because alcohol gel alone may not be enough for some viruses, and clean shared surfaces often.
How floodwater spreads it: this bacterium lives on normal skin, but skin soaked for long periods or cut while wading lets it enter wounds more easily. Where it hides: bed sheets, towels, air mattresses and wet wound-care supplies. Symptoms and who is at risk: red, swollen, warm wounds or pus; bedridden patients with pressure sores are a key risk group. Prevention: discard wet dressings, keep wounds covered and dry, and contact a doctor or nurse if a wound changes. Adults who were cut by sharp objects during the flood should ask a doctor about tetanus vaccination.
How floodwater spreads it: this bacterium thrives in wet conditions, in still water and on surfaces that never fully dry. Where it hides: bathroom drains, washbasins, dish sponges, water containers and home medical equipment such as nebuliser parts or oxygen humidifier bottles. Symptoms and who is at risk: wound, skin or urinary infections; people with catheters or chronic wounds are more vulnerable. Prevention: change water in medical devices as the manufacturer recommends, and clean and fully dry them.
How floods spread them: they do not come from the water itself, but crowding, cool damp air and exhaustion during floods increase spread through droplets and shared surfaces. Where they hide: bed rails, door handles, phones and bedside tables. Symptoms and who is at risk: fever, cough, runny nose and breathlessness; young children and bedridden elders are at risk of pneumonia. Prevention: wear a mask when you have a cold, keep anyone with a cold away from the patient's room, and clean contact surfaces often.
How floodwater spreads it: through food and drinking water contaminated with faeces. Where it hides: water containers, cups and food prepared with unwashed hands. Symptoms and who is at risk: fatigue, loss of appetite, and yellow skin or eyes; adults usually show clearer symptoms than children. Prevention: drink safe water, cook food thoroughly, and ask a doctor about vaccination if you are in a risk group.
How floods spread them: mould spores are everywhere in the air, and materials that stay wet for more than 24 to 48 hours begin to grow mould. Skin fungi cause the athlete's-foot-like condition Thais call nam kat tao when feet stay wet. Where they hide: wooden walls, ceilings, under mattresses, wardrobes, carpets and curtains. Symptoms and who is at risk: coughing, sneezing, a blocked nose, asthma flare-ups, and in people with very weak immunity, lung infection; for skin fungi, soggy, itchy, peeling feet. Prevention: throw out porous items that stayed wet, ventilate, dry the house as fast as possible, dry feet well and change socks often.
How this links to disinfection spraying: the World Health Organization (WHO) and the US Centers for Disease Control and Prevention (CDC) advise cleaning flood-contaminated surfaces first and then disinfecting them. According to WHD's service information, CHEMGENE HLD4H is stated to cover viruses, bacteria and fungi, with named organisms including RSV, influenza H1N1 and H5N1, hand-foot-and-mouth virus, norovirus and Salmonella. The other germs above, such as Leptospira, E. coli, Shigella, Staphylococcus, Pseudomonas, rotavirus and hepatitis A, belong to the bacteria or virus groups the product says it covers, but this article does not claim a specific test result for them. If you need test data for a particular organism, ask WHD directly.
Health: bedridden patients are more likely than healthy adults to develop infected pressure sores, urinary infections and pneumonia. If a home stays damp and contaminated, the chance of a return trip to hospital rises. Caregivers face their own risks from wading and from lifting patients on slippery floors.
Money: patient beds, air mattresses, wheelchairs and medical devices are expensive. If they rust or grow mould because cleaning came too late, they may have to be replaced.
Time and stress: families caring for a patient are already stretched. Washing the house, moving belongings and worrying whether the home is safe yet leaves them physically and emotionally exhausted.
Many families blast the mud away with a hose and then run fans to dry the house. This removes a lot of visible dirt, but it has limits.
That is why disinfection spraying by trained technicians, after mud removal and washing, is a useful extra step that gives families more confidence before a bedridden patient returns to their own room.
According to World Health Disinfection (WHD) service information, the disinfection service is carried out by trained technicians using spraying and/or ULV (Ultra Low Volume) fogging, which produces a fine mist that spreads evenly. The disinfectant is CHEMGENE HLD4H, a medical-grade product from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. The service page states it covers viruses, bacteria and fungi, including COVID-19, RSV, H1N1, H5N1 and hand-foot-and-mouth virus, with a claimed 99.99% efficacy, and lists approvals or references from the Thai Department of Medical Sciences, Mahidol University, NHS England and the EN 14476:2013+A2:2019 standard.
For canal-side homes in the Khu Khot area, the recommended sequence is:
WHD is based in Bang Khae, Bangkok 10160. Jobs in Pathum Thani, including Khu Khot and Lam Luk Ka, are arranged by phone on 065-556-6294 or LINE @whd268. The company has no local branch, and scheduling depends on the flood-season queue, so contact the team in advance. If a strong musty smell remains after spraying, you can also ask about the complementary residential ozone disinfection service for odours in the air.
Before entering the house
While cleaning
Before and after spraying
Q: When should spraying be done?
A: After mud removal, washing and the start of drying. Spraying over mud or grime does not let the disinfectant reach germs properly.
Q: Can a bedridden patient stay in the house during spraying?
A: Not in the zone being sprayed. Patients, caregivers and pets must leave that zone and return only at the time the technicians give. Plan to move the patient to another room or a relative's home for a while.
Q: How long before we can go back in?
A: According to the service information, about 30 minutes, but always follow the technicians' advice on the day and ventilate first.
Q: Does spraying fully prevent leptospirosis?
A: Spraying reduces germs on cleaned surfaces inside the home. It does not protect against infection from wading in floodwater or mud outside. Keep wearing boots, wash your feet and see a doctor if you develop a fever after wading.
Q: Does WHD cover Khu Khot and Lam Luk Ka?
A: WHD is based in Bang Khae, Bangkok, and arranges jobs in Pathum Thani via 065-556-6294 or LINE @whd268. Dates depend on the queue.
Q: How much does it cost?
A: It depends on area size and condition. Send photos and details for an assessment and quotation.
Q: Is the product residue-free?
A: This article makes no residue-free claim. If someone at home is sensitive, tell the team before the job and ask for the product's safety information.
Send photos of the house, the patient's room and the water line on the walls, and get advice on the right steps for your home.
View WHD Disinfection ServiceCall 065-556-6294 | LINE @whd268
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