Why stomach infections and waterborne diseases increase during the monsoon season

When the monsoon arrives, most people become concerned about mosquito-borne illnesses such as dengue and malaria. While these diseases are indeed common during the rainy season, they are not the only health risks people should be aware of. Monsoon weather also creates ideal conditions for the spread of stomach infections and waterborne diseases, which affect thousands of people every year.

Heavy rainfall, waterlogging, contaminated water supplies and increased humidity contribute to the rapid growth of harmful bacteria, viruses and parasites. These microorganisms can contaminate food and drinking water, leading to a variety of digestive illnesses ranging from mild stomach upset to serious infections requiring medical treatment.

According to Dr Tushar Goyal, Consultant Physician at Kailash Hospital, Greater Noida, monsoon conditions significantly increase the risk of diseases such as food poisoning, gastroenteritis, typhoid, cholera and hepatitis A.

Understanding why these infections become more common during the rainy season and knowing how to prevent them can help individuals and families stay healthy throughout the monsoon months.

Why infections spread during monsoon

The rainy season brings several environmental changes that make the spread of infections easier. One of the biggest reasons is water contamination.

During heavy rainfall, drains often overflow and sewage systems can become flooded. When this happens, contaminated water may mix with drinking water sources. As a result, harmful bacteria, viruses and parasites can enter the water that people use for drinking, cooking and washing food.

The warm and humid weather of the monsoon season also provides ideal conditions for microorganisms to multiply rapidly. Food tends to spoil faster in humid conditions, increasing the risk of foodborne illnesses if it is not stored properly.

Street food and uncovered food items are particularly vulnerable to contamination during this time. Rainwater, flies and dust can easily come into contact with food sold in open areas, making it unsafe to consume.

Even food prepared at home can become risky if precautions are not taken. Leftover food that is left at room temperature for long periods may become contaminated with bacteria. Improper refrigeration or storage can further increase the risk of infection.

Another common problem during monsoon is the consumption of fruits and vegetables that have not been washed thoroughly. Contaminated water used during farming, transportation or handling can leave harmful germs on the surface of produce.

As a result, digestive infections become significantly more common during the rainy season.

Among the most frequently reported illnesses is acute gastroenteritis, an infection that affects the stomach and intestines. It commonly causes symptoms such as diarrhoea, vomiting, stomach cramps and dehydration.

In many cases, people recover within a few days if they receive adequate fluids and rest. However, severe dehydration can become dangerous, especially for young children, elderly individuals and people with weakened immune systems.

Typhoid fever is another infection that becomes more common during the monsoon. It spreads through contaminated food and water and can cause prolonged fever, weakness, stomach pain, headache and loss of appetite.

Cholera, although less common, remains a serious concern in areas with poor sanitation. The disease can lead to severe watery diarrhoea and rapid dehydration, which may become life-threatening if treatment is delayed.

Hepatitis A is another waterborne disease that tends to increase during the rainy season. This viral infection affects the liver and may cause symptoms such as fever, nausea, vomiting, fatigue, abdominal pain and jaundice.

ALSO READ: Trump imposes 25% tariff on some Brazilian imports after trade investigation

ALSO READ: Fahadh Faasil explains why he turned down Alejandro G. Iñárritu's Hollywood project

Simple steps to stay protected

The good news is that most monsoon-related stomach infections can be prevented through simple hygiene and food safety practices.

One of the most important precautions is ensuring access to safe drinking water. Experts recommend drinking only boiled, filtered or purified water during the monsoon season. Water purification helps eliminate harmful microorganisms that may be present in contaminated supplies.

Eating freshly prepared food is another effective way to reduce the risk of infection. Freshly cooked meals are less likely to contain harmful bacteria compared to food that has been sitting out for long periods.

People should also avoid eating uncovered street food, cut fruits sold in open areas and raw salads from unhygienic sources. These foods are more likely to be exposed to contamination from flies, dust and polluted water.

Hand hygiene plays a crucial role in preventing infections. Washing hands thoroughly with soap before eating, after using the toilet and after handling potentially contaminated objects can significantly reduce the spread of germs.

Fruits and vegetables should always be washed carefully before consumption. In some cases, soaking them in clean water and thoroughly rinsing them can help remove dirt and microorganisms from the surface.

Proper storage of food is equally important. Leftovers should be refrigerated promptly and reheated thoroughly before consumption. Food that has been left outside for extended periods should be discarded rather than consumed.

Certain groups of people require extra caution during the monsoon season. Infants, elderly individuals, pregnant women and people with conditions such as diabetes or weakened immunity are more vulnerable to infections and dehydration.

For these individuals, maintaining strict food and water hygiene is especially important. They should also ensure adequate hydration throughout the day, as dehydration can develop quickly during gastrointestinal illnesses.

Recognising warning signs early can also help prevent complications. Symptoms such as persistent diarrhoea, repeated vomiting, high fever, severe stomach pain, blood in stools, dizziness, weakness, dry mouth or reduced urination should not be ignored.

According to Dr Goyal, medical attention should be sought immediately if any of these symptoms appear. Early treatment can prevent dehydration and reduce the risk of more serious complications.

While dengue and malaria often dominate health discussions during the rainy season, stomach infections and waterborne diseases remain equally important concerns. These illnesses may seem minor at first but can quickly become serious if left untreated.

By following basic hygiene practices, consuming safe food and water and seeking medical advice when necessary, individuals can greatly reduce their risk of falling ill during the monsoon.

Simple preventive measures taken every day can go a long way in protecting health and ensuring that the rainy season remains enjoyable and safe for the entire family.