When Rain Turns Risky: The Hidden Rise of Typhoid, Gastroenteritis and Hepatitis A/E in Pakistan

The arrival of the monsoon brings relief from the intense summer heat, but it also creates ideal conditions for waterborne and foodborne diseases. Heavy rainfall can overwhelm drainage systems, mix sewage with drinking-water supplies and leave communities dependent on water that may appear clean but contains harmful bacteria, viruses or parasites. Power outages and high humidity can also affect food storage, increasing the risk of contamination. Recognising these seasonal dangers is essential for protecting families from typhoid fever, gastroenteritis, hepatitis A, hepatitis E and other diarrhoeal illnesses.

Pakistan’s National Institutes of Health has issued specific guidance on the prevention and control of monsoon-related diseases because these infections become a significant public-health concern during the rainy season. The connection between these conditions is the faecal-oral route of transmission. This means that microscopic traces of infected human waste can enter drinking water or food and subsequently reach another person’s digestive system. Contamination may occur through sewage leakage, unwashed hands, unsafe ice, poorly cleaned utensils, street food, raw produce or water stored in uncovered containers. National Institutes of Health Pakistan

Typhoid Fever: More Than an Ordinary Fever

Typhoid fever is a potentially serious bacterial infection caused by Salmonella Typhi. Unlike ordinary gastroenteritis, typhoid is a systemic infection. After entering the body through contaminated food or water, the bacteria multiply in the intestinal tract and can spread into the bloodstream. The illness may begin gradually, with a persistent or rising fever, tiredness, headache, loss of appetite, nausea and abdominal discomfort. Some patients develop diarrhoea, while others experience constipation. Without appropriate diagnosis and treatment, typhoid can cause intestinal bleeding, perforation and other life-threatening complications.

Typhoid symptoms can resemble those of dengue, malaria and other febrile illnesses commonly encountered during Pakistan’s monsoon season. It cannot therefore be diagnosed reliably from fever alone. Medical evaluation and appropriate laboratory testing are important, preferably before antibiotics are started when clinically possible. Self-medication with leftover antibiotics should be avoided. Antibiotic resistance has become a major challenge in typhoid treatment, and the wrong medicine or an incomplete course may delay recovery and contribute to further resistance.

According to the World Health Organization, safe drinking water, adequate sanitation, food-handler hygiene and typhoid vaccination are important preventive measures. Even after symptoms improve, some people can continue carrying and spreading Salmonella Typhi, which is why prescribed antibiotics must be completed and follow-up advice should be followed carefully. World Health Organization: Typhoid

Gastroenteritis and Diarrhoeal Illness: Similar Terms, Different Meanings

Gastroenteritis refers to inflammation of the stomach and intestines, usually caused by a viral, bacterial or parasitic infection. Common symptoms include nausea, vomiting, abdominal cramps, watery stools, fever and weakness. Diarrhoea, on the other hand, is a symptom rather than a single disease. The World Health Organization defines it as passing three or more loose or liquid stools in a day, or more frequently than is normal for that individual.

During the rainy season, gastroenteritis may result from contaminated drinking water, improperly stored food, unwashed fruits and vegetables, unsafe street food or poor hand hygiene. Viral gastroenteritis can spread rapidly between family members, while bacteria such as Escherichia coli, Salmonella, Shigella and Campylobacter may cause more severe foodborne and waterborne illness. Parasites such as Giardia and Entamoeba can also be transmitted through contaminated water.

The greatest immediate danger of diarrhoeal illness is dehydration. Frequent stools and vomiting remove water and important electrolytes from the body. Infants, young children, older adults, pregnant women and people with chronic illnesses can deteriorate particularly quickly. Warning signs of dehydration include intense thirst, dry mouth, sunken eyes, reduced urination, unusual sleepiness, irritability, dizziness and an inability to drink or retain fluids.

Oral rehydration solution, commonly known as ORS, replaces both water and essential salts more effectively than plain water alone. A commercially prepared ORS sachet should be mixed with the exact quantity of safe water stated on the packet. Adding too much or too little water can make the solution unsafe or ineffective. Breastfeeding and age-appropriate nutrition should usually continue during diarrhoea unless a healthcare professional advises otherwise. Children may also be prescribed zinc, but the dose should be determined according to age and medical guidance. World Health Organization: Diarrhoeal Disease

Antibiotics are not required for every episode of gastroenteritis. Many cases are viral and improve with hydration and supportive care. Unnecessary antibiotics can cause side effects, disturb healthy gut bacteria and contribute to antimicrobial resistance. Anti-diarrhoeal medicines should also not be taken automatically, especially when there is high fever, blood in the stool or suspected bacterial dysentery.

Hepatitis A and E: When Contaminated Water Affects the Liver

Hepatitis A and hepatitis E are viral infections that cause inflammation of the liver. Both can spread through food or drinking water contaminated with infected faecal matter. Their early symptoms may initially resemble a stomach infection and can include fever, fatigue, nausea, vomiting, reduced appetite and abdominal discomfort. As liver inflammation progresses, patients may develop dark urine, pale or clay-coloured stools, itching and jaundice, which causes yellowing of the skin or whites of the eyes.

Hepatitis A usually resolves completely and does not cause chronic liver disease, although recovery can take several weeks or months. Rarely, it can lead to acute liver failure. A safe and effective hepatitis A vaccine is available, and individuals can discuss its suitability with their doctor based on age, health status, previous vaccination and risk of exposure. World Health Organization: Hepatitis A

Hepatitis E is particularly important in Pakistan because contaminated drinking water can lead to community outbreaks. Most infections resolve within several weeks, but hepatitis E can become dangerously severe in pregnancy. Women infected during the second or third trimester have a higher risk of acute liver failure, pregnancy loss and maternal death. Any pregnant woman who develops jaundice, dark urine, persistent vomiting or severe weakness should receive urgent medical assessment. World Health Organization: Hepatitis E

Patients with suspected hepatitis should not begin herbal remedies, supplements, antibiotics or pain medicines without medical advice. Some medicines and traditional preparations can place additional stress on an already inflamed liver. Blood tests are required to identify the type of hepatitis and assess liver function.

Safe Drinking Water Is the First Line of Defence

Water that looks clear is not necessarily safe. During heavy rain, damaged pipelines and low water pressure can allow sewage-contaminated water to enter domestic supplies. When the safety of drinking water is uncertain, it should be boiled properly and then cooled in a covered, clean container. A reliable water-filtration or disinfection method may also be used according to public-health guidance. The same safe water should be used for drinking, making ice, preparing infant feeds, mixing ORS, brushing teeth and washing foods that will be eaten raw.

Household water containers should be washed regularly and kept tightly covered. Hands, cups or utensils should not be dipped directly into stored water because this can reintroduce contamination. Water should instead be poured through a clean tap or ladle reserved for that purpose.

Food Hygiene During the Monsoon

Food spoils more quickly in warm and humid conditions. Cooked meals should be eaten while fresh and hot rather than left at room temperature for long periods. Refrigerated food that has been exposed to a prolonged power outage may no longer be safe, even if its smell and appearance seem normal. Meat, poultry, eggs and seafood should be cooked thoroughly, while raw foods should be kept separate from cooked meals to prevent cross-contamination.

Fruits and vegetables should be washed using safe water and peeled when possible. Unpasteurised milk, uncovered food, raw chutneys prepared with questionable water and ice from an unknown source should be avoided. Street food can be particularly risky when it has been left exposed to flies, dust, rainwater or repeated handling.

Handwashing with soap remains one of the simplest and most effective ways to prevent monsoon diseases in Pakistan. Hands should be washed after using the toilet, cleaning a child, handling waste and before preparing, serving or eating food. Food handlers experiencing diarrhoea, vomiting or typhoid should not prepare meals for other people until medically cleared.

When Medical Care Should Not Be Delayed

Immediate medical assessment is needed when diarrhoea or vomiting is accompanied by blood in the stool, persistent high fever, severe abdominal pain, repeated vomiting, confusion, extreme weakness, reduced urination, inability to drink, jaundice or signs of severe dehydration. Medical advice is also important when diarrhoea persists, when symptoms affect an infant or an older person, or when the patient has diabetes, kidney disease, liver disease or reduced immunity.

Pregnant women require particular caution during the monsoon because dehydration and hepatitis E can carry serious maternal and fetal risks. Early evaluation is safer than waiting for symptoms to become severe.

Prevention Begins Before Illness Appears

Typhoid, gastroenteritis, hepatitis A/E and diarrhoeal disease are not unavoidable consequences of the rainy season. Safe drinking water, proper sewage disposal, handwashing, food hygiene, timely vaccination and early medical assessment can prevent many infections and their complications. Every household should review its drinking-water source, food-storage practices and emergency supply of sealed ORS before heavy rainfall begins.

The monsoon may change the environment around us, but careful daily choices can greatly reduce the risk of waterborne diseases and protect the health of Pakistani families.

Disclaimer

This article is intended for general education and public-health awareness only. It does not replace individual medical consultation, diagnosis or treatment. Anyone experiencing persistent fever, severe diarrhoea, dehydration, blood in the stool, jaundice, repeated vomiting or worsening symptoms should seek prompt medical care. Pregnant women, infants, older adults and people with chronic medical conditions should consult a qualified healthcare professional without delay.