Last updated: 8 Oct 2026 | 18 Views |
From late September into early October 2026, many villages in Nong Rong sub-district, Nong Khae district, Saraburi, lived with floodwater that receded only slowly. Long-standing water is different from a flood that comes and goes quickly: germs have time to multiply in still water, people wade through it day after day, toilets stop working, clean drinking water runs short, and families crowd into relatives' homes or temporary shelters. The result is a wide range of illness, from pink eye, diarrhoea, dysentery and leptospirosis to skin rashes, coughs and mould in the house. This guide brings together as many of these germs as possible, explains where each comes from, where it hides, who is at risk and how to prevent it, and ends with why the disinfection spraying service from World Health Disinfection (WHD), done after cleaning, helps Nong Rong families move home with more confidence.
According to Thailand's Public Relations Department (PRD), on 1 October 2026 the Minister of Tourism and Sports visited Nong Rong sub-district in Nong Khae district, Saraburi, where floods had affected 10 villages and several hundred households. The affected areas covered on that visit spanned 4 sub-districts and 16 villages and communities. Medical supplies, food and drinking water were handed out, and officials continued to monitor water levels.
This information reflects the date of reporting only; conditions change daily, so readers should follow announcements from Saraburi province, Nong Khae district and local administrations. The report did not give water depths for individual villages, and this article does not guess them.
Nationally, the Department of Disaster Prevention and Mitigation (DDPM) reported, as of 06.00 on 7 October 2026, that floods had affected 27 provinces plus Bangkok, covering 123 districts, 984 sub-districts and 1,154,875 households, or more than 3.1 million people (published by the PRD).
The need to hand out medicines and drinking water shows how hard clean water and healthcare become during a flood, and the health risk does not end when the water drops: a house soaked for days becomes a store of germs.
A typical scenario based on common situations (an example case, not a verified customer review).
Noi lives in a single-storey concrete house with her husband, their eight-month-old daughter and her grandmother, who is nearly eighty. When the water came in, they lifted what they could and moved to a relative's house on higher ground, which soon sheltered three families, including small children and older people.
While they waited, her husband waded back almost daily to check the house. The village water was still, smelly and full of floating rubbish. Within days, several people in the shared house had red, itchy, sticky eyes; the baby started coughing; the grandmother developed an itchy red rash in her skin folds; and Noi's husband had diarrhoea after using ice from a shared bucket. All of them went to the nearby health service, which was exactly right.
When the water finally drained and they went home, they found mud on the floors, a waterline on the walls, sodden mattresses, swollen particle-board cupboards and a musty smell everywhere. Noi worried most about her daughter, who was crawling and putting everything in her mouth. Would washing be enough, or did the house need more so that the baby and grandmother would not fall ill again? Her question is the same one facing hundreds of households in Nong Rong, and it leads to the most important part of this article.
Long-standing floods raise disease risk in three ways: still water mixed with sewage, a lack of clean water and toilets, and crowded living. WHO, the US CDC and Thailand's Department of Disease Control all warn of pink eye, gut infections, leptospirosis, skin disease and respiratory illness after floods. These are the germs that fit a slow-draining village flood like Nong Rong's.
How the flood spreads it: conjunctivitis spreads easily after floods as dirty water splashes into eyes, people rub their eyes with soiled hands and share towels in crowded shelters. Where it hides: face towels, pillowcases, door handles, remotes and phones. Symptoms and risk: red, gritty, watery eyes with discharge, sometimes small bleeds in the white of the eye; any age, especially schoolchildren. Prevention: do not rub eyes, wash hands often, use your own towel, follow a doctor's advice on staying home, and see a doctor for severe pain or blurred vision.
How the flood spreads it: cholera is not common day to day, but health authorities always watch for it when drinking water is contaminated with sewage during floods. Where it hides: unboiled water, ice and undercooked seafood or food. Symptoms and risk: large volumes of watery "rice-water" diarrhoea, vomiting and rapid dehydration; children and older adults are most at risk. Prevention: drink boiled or sealed bottled water, eat freshly cooked food, and sip oral rehydration salts and see a doctor quickly for heavy watery diarrhoea.
How the flood spreads it: it spreads from tiny doses via hands, water and food contaminated with faeces, and the risk climbs when village toilets fail. Where it hides: taps, water scoops, handles and shared bathroom floors. Symptoms and risk: bloody, mucous diarrhoea, straining and fever; young children are at high risk. Prevention: wash hands with soap after the toilet and before eating, and clean shared touch points daily.
How the flood spreads it: this single-celled parasite contaminates water and food through faeces, and its cysts survive a long time in the environment. Where it hides: unboiled water and vegetables rinsed in floodwater. Symptoms and risk: lingering diarrhoea with mucus and blood and abdominal pain; occasionally it spreads to the liver. Prevention: boil drinking water, rinse vegetables in clean water, wash hands before eating, and see a doctor for diarrhoea lasting several days.
How the flood spreads it: faecal-oral spread via water, ice and uncooked food, especially when families share containers. Where it hides: ice buckets, shared cups and utensils. Symptoms and risk: tiredness, poor appetite, nausea, yellow skin and eyes, and dark urine. Prevention: use your own cup, avoid ice of unknown origin, and ask a doctor about vaccination if you are at risk.
How the flood spreads it: it arrives in sewage and spreads through hands, food and surfaces, quickly causing clusters in shared homes. Where it hides: dining tables, rails, bathrooms and places where someone vomited. Symptoms and risk: sudden vomiting, diarrhoea and cramps; children and older adults risk dehydration. Prevention: wash hands with soap and water, and clean then disinfect contaminated spots at once. The product information for CHEMGENE HLD4H, which WHD uses, lists norovirus as covered.
How the flood spreads it: faecal-oral spread; crawling babies who put things in their mouths are most exposed. Where it hides: floors, toys, mats and feeding bottles. Symptoms and risk: vomiting, watery diarrhoea and fever; children under five can dehydrate. Prevention: clean and disinfect crawling areas, wash or boil bottles in clean water, and ask a doctor about age-appropriate vaccination.
How the flood spreads it: long-standing water forces people to wade daily while rats flee to higher ground and urinate into the water. Where it hides: standing water around homes, wet mud on floors and rubbish piles. Symptoms and risk: sudden high fever, calf pain, red eyes and headache one to two weeks after wading. Prevention: wear boots, cover wounds, wash feet after wading, and see a doctor promptly with fever and calf pain, mentioning the wading.
How the flood spreads it: found in the gut, soil and water, it grows on wet, dirty surfaces. Where it hides: basins, drains, water containers and care equipment for bedridden patients. Symptoms and risk: urinary infections, pneumonia or wound infections, mainly in older adults, bedridden people and the immunocompromised. Prevention: clean and disinfect care equipment and keep patients' rooms dry and clean.
How the flood spreads it: common in water and soil, it thrives in foam mattresses, cushions and carpets that stay wet. Where it hides: mattresses, pillows, sofas and dish sponges. Symptoms and risk: itchy follicle rashes, ear infections and wound infections; the immunocompromised are most at risk. Prevention: discard soaked mattresses and cushions and dry the house fast.
How the flood spreads it: skin soaked for days softens and scrapes easily; dirty water then lets skin bacteria in. Where it hides: shared towels and clothes. Symptoms and risk: pustules, boils, impetigo in children and red, swollen wounds. Prevention: shower with clean water after wading, cover wounds and do not share towels; ask a doctor about tetanus vaccination after a dirty cut.
How the flood spreads it: crowding, damp air and exhaustion help respiratory viruses spread. Where it hides: droplets on tables, rails and shared items. Symptoms and risk: fever, cough, runny nose and breathlessness; babies, older adults and people with lung disease are most at risk. Prevention: masks when sick, ventilation and keeping the sick apart. WHD's service information lists H1N1 and RSV as covered.
How the flood spreads it: it does not come with the water but spreads by coughing where people live close together, as in shared flood shelters. Where it hides: airborne droplets and surfaces near a sick person. Symptoms and risk: bouts of coughing with a "whoop" on breathing in; babies not fully vaccinated are most at risk. Prevention: keep children's vaccines on schedule, keep people with lasting coughs away from babies, and see a doctor at once if a baby turns blue while coughing. WHD's product information lists Bordetella pertussis as covered.
How the flood spreads it: skin that stays damp for days, on wading feet and in unwashed skin folds, lets fungi grow. Where it hides: shoes, socks, nappies and damp clothes. Symptoms and risk: athlete's foot, itchy red rashes in skin folds, under the breasts and in the groin, and nappy rash; older adults, people with diabetes and babies are most at risk. Prevention: shower after wading, dry skin folds well, change nappies often and see a doctor if a rash spreads.
How the flood spreads it: walls, particle board, cupboards and mattresses soaked for longer than 24 to 48 hours begin to grow mould, according to CDC; Stachybotrys and Chaetomium favour cellulose such as gypsum-board paper and particle board. Where it hides: below the waterline, swollen cupboards, behind furniture and damp ceilings. Symptoms and risk: musty smell, congestion, cough and asthma flare-ups; babies, older adults and people with allergies are most affected. Prevention: remove mouldy materials wearing an N95 mask and dry the house. WHD's service information states that fungi are covered.
A straight answer on coverage: WHD's product and service information names organisms it covers, such as norovirus, influenza H1N1 and H5N1, RSV, Bordetella pertussis, hand-foot-mouth virus, Salmonella, mycobacteria, and bacteria and fungi in general. The others here, such as adenovirus, Vibrio, Shigella, hepatitis A, rotavirus, Leptospira, Klebsiella, Pseudomonas, Staphylococcus, Candida and specific moulds, belong to the virus, bacteria or fungus groups the product describes as broad-spectrum coverage. We do not claim undocumented organism-specific results; ask WHD for test data on a particular organism. For parasites such as Entamoeba, boiling water and handwashing are the main defences, and for person-to-person illnesses like pink eye and whooping cough, separating personal items and seeing a doctor matter most. Spraying reduces germs on surfaces; it does not replace washing, treatment or vaccination.
Together, these 15 germs show that a slow-draining flood creates layered risk: germs in still water and mud, germs on shared touch points and mould in walls that have not dried. Recovery must follow an order: remove mud, wash, dry, then spray disinfectant across floors, lower walls, bathroom, kitchen, crawling areas and touch points, which is what WHD's post-flood disinfection spraying is designed to do.
Health: pink eye and diarrhoea circulating in the household, crawling babies picking up germs from untreated floors, and older relatives with skin rashes and mould-related coughs.
Money and time: repeated trips for treatment, replacing mouldy mattresses and furniture, and delays to work and school while family members stay sick.
Community: pink eye, flu and diarrhoea pass easily between homes in a village that shares spaces and items, so every household that cleans and disinfects properly protects its neighbours too.
Long soaking drives germs deep: walls, bare concrete and timber soaked for days absorb dirty water into the material, so surface washing misses a lot.
Ordinary cleaners are not made for sewage: they remove stains and smells, not broad contamination from sewage-laden water.
Shared touch points get overlooked: handles, taps, switches and rails pass on pink eye and diarrhoea germs but rarely get special attention.
Misusing bleach is risky: mixed with toilet cleaners or ammonia it releases dangerous gas, and it should not be used in closed rooms with babies or older people.
Recovery therefore needs two layers: washing by the household, then systematic disinfection by a trained team.
According to WHD's service information, trained technicians spray and/or apply an Ultra Low Volume (ULV) mist of CHEMGENE HLD4H, a UK medical-grade disinfectant containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. The service page states 99.99% effectiveness against viruses, bacteria and fungi and lists approvals and testing including Thailand's Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019.
WHD is based in Bang Khae, Bangkok 10160, with no branch in Saraburi. Upcountry jobs in Nong Khae are arranged by phone on 065-556-6294 or LINE @whd268; the team confirms travel, dates and details directly, so contact them early during flood season. Customers receive a free CHEMGENE spray bottle and WELLGIENIC wet wipes, and a tax invoice is available. For lingering musty smells, ask about residential ozone disinfection.
Q: The house looks dry now. Do I still need disinfection?
A: Homes soaked for days often hold germs in materials and on touch points even when surfaces look dry. Washing then spraying reduces what you cannot see.
Q: Family members still have pink eye. Will spraying cure it?
A: No. Spraying reduces germs on surfaces but does not treat illness; see a doctor, separate personal items and wash hands often.
Q: How do we prepare with a baby at home?
A: Take the baby out during spraying, store bottles and baby items away, return at the time given and wipe crawling areas with clean water first.
Q: Does WHD serve Nong Khae?
A: WHD is based in Bang Khae, Bangkok, with no Saraburi branch. Upcountry jobs are arranged by phone or LINE, and the team confirms details directly.
Germs after a long-standing flood come in many forms: pink-eye viruses, diarrhoea and dysentery germs, rat-borne bacteria, respiratory viruses, skin fungi and mould in the walls. Once you have washed, WHD's spraying service, using a medical-grade disinfectant its product information describes as broad-spectrum, helps prevent and eliminate the germs left on surfaces so babies, grandparents and the whole family can live at home with confidence.
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