In addition to alum, chloramine B and lime chloride can be used to treat domestic water for collective needs. To avoid chloramine B poisoning, people need to mix the correct dose with each powder or tablet preparation. Dosage is 10 g powder for a 1,000 liters of water or 0.25 g tablets for 25 liters of water, after being mixed for at least 30 minutes before being boiled for drinking.
A more concentrated solution (chloramine B 2%) can be used to clean and disinfect instrument surfaces. This method needs to be guided by professionals such as medical staff and epidemic prevention staff. Even though it has been disinfected, the water still needs to be boiled before it can be used for drinking.
With contaminated wells, people should conduct dredging, cleaning wells, disinfecting water with alum, chloramin B and lime chloride. In the meantime, families should choose to use the least contaminated well for temporary water treatment. If the conditions are difficult and it is not possible to have disinfectant chemicals, people should choose the least affected water source, use a clean cloth to filter many times, treat garbage and residue, can pass through a homemade filter from gravel, Golden sand, charcoal, cloth then used for bathing.
If used for food, families should boil water for at least 10 minutes; absolutely do not eat vegetables washed with contaminated water, not disinfected. For infants and young children, the digestive system is not yet fully developed, so it is safer for children to use bottled water.
According to specialist doctor I Hoang Dinh Thanh, Department of Gastroenterology, Center for Endoscopy and Gastrointestinal Surgery (Tam Anh General Hospital in Ho Chi Minh City), poisoning is caused by drinking dirty water or infected with bacteria. creatures after the rainy season are very common. Depending on the risk factor, it can cause acute, long-term illness or lead to death. In addition to water treatment, caution in eating and drinking, people avoid contact with dirty water, mud. The larvae can penetrate through the skin, enter the circulation causing disease.
In the long term, people living in areas that are often flooded and flooded with rain should be vaccinated against cholera, hepatitis A, polio, typhoid, etc. Vaccines help strengthen resistance, contributing to preventing the risk of infection. .
Digestive diseases such as cholera, diarrhea causing abdominal pain, fever, nausea, vomiting, headache… can lead to death if dehydration is severe. Drinking contaminated water can also cause salmonellosis, which can lead to intestinal inflammation. Another disease affecting the gastrointestinal tract caused by contaminated water is shigellosis. Shigellosis bacteria have the ability to destroy the intestinal lining, causing stomach cramps, vomiting and bloody diarrhea.
Doctor Dinh Thanh added that polluted water is a favorable environment for viruses to develop such as hepatitis A virus, encephalitis, polio, adenovirus, calcivirus, and rotavirus. These viruses can be deadly, especially in groups with low resistance such as the elderly, infants and young children. Floodwaters can also spread many parasites that can penetrate quickly through the skin such as cryptosporidiosis caused by cryptosporidium parasites, amoeba caused by infection with entamoeba histolytica, schistosomiasis…