The monsoon brings relief — and a disruption of infrastructure that is invisible until someone gets sick. Flooding overwhelms drainage systems and contaminates drinking water supplies with faecal matter. Overhead tanks, borewells, and even municipal water that seems clean can carry hepatitis A virus, hepatitis E virus, the cholera bacterium, typhoid bacilli, and a range of other enteric organisms. All of them enter through the mouth. All of them target the gut, the liver, or both. What we informally call monsoon me pet ki bimari — stomach and gut illness in the rains — is, in most cases, one of these waterborne or foodborne infections expressing itself.

The Infections That Concern Hepatologists Most

Hepatitis A and hepatitis E dominate the hepatology clinic during July and August. Both travel by the faecal-oral route: contaminated water, shellfish (oysters and clams concentrate the virus efficiently), raw foods washed with untreated water, or hands that were not properly washed before a meal. Both cause acute hepatitis — fever, nausea, loss of appetite, jaundice — that can be clinically indistinguishable without blood tests.

In an otherwise healthy adult, hepatitis A is self-limiting. The liver enzymes rise sharply, the patient feels genuinely unwell for several weeks, and recovery is complete in the overwhelming majority of cases. Hepatitis E in most healthy adults follows a broadly similar course — uncomfortable, but manageable at home with rest and hydration. The concern is in who falls outside those comfortable majorities.

Cholera and typhoid complete the monsoon quartet. Cholera causes the dramatic, rapid fluid loss that can become dangerous within hours. Typhoid is more insidious — a persistent fever, abdominal discomfort, and intestinal complications that develop over days. Both are waterborne; both are preventable with the same precautions that protect against hepatitis A and E.

Why Patients With Liver Disease Face a Different Risk

For a patient managing cirrhosis, a hepatitis A or E infection is not a “you’ll recover, just rest” situation. The diseased liver has already lost functional reserve. An acute viral hepatitis superimposed on cirrhosis can trigger acute-on-chronic liver failure — a rapid, multi-organ deterioration that is life-threatening and requires intensive care. Monsoon-season viral hepatitis is a well-recognised precipitant of ACLF, and it is entirely preventable.

Hepatitis E in pregnancy carries a risk that is worth stating plainly: severe hepatitis E can cause acute liver failure in pregnant women, and India has among the highest recorded rates of this complication in the world. Any pregnant woman who develops jaundice during the monsoon months needs urgent assessment — not a wait-and-see approach.

Practical Prevention: What Actually Works

Water is the central variable. Boiling water or using a reliable RO-UV purifier for drinking, cooking, and even rinsing raw vegetables removes the biological risk from the faecal-oral route. The filter on the tap achieves nothing if the water used to wash salad leaves or make ice is untreated — those are the routes that catch careful households off guard.

Street food during peak monsoon months deserves genuine caution, particularly cut fruit, chaat items, and anything prepared with water of unknown provenance. Shellfish — oysters, clams, mussels — should be avoided from July through September. They concentrate hepatitis A virus from contaminated coastal water; even thorough cooking does not eliminate all risk if the raw shellfish was severely contaminated.

Hepatitis A vaccination is safe, effective, and available across Mumbai. For any patient with chronic liver disease — cirrhosis, fatty liver disease, hepatitis B or C — vaccination against hepatitis A is not optional; it is a straightforward way to remove one serious risk from an already complicated clinical picture. If you are not sure whether you are vaccinated, a simple blood test can check immunity. Discuss it with your hepatologist at the next visit, or sooner if monsoon season has already arrived.

Hand hygiene is not glamorous, but it is mechanically effective in a way that no supplement or herbal preparation can replicate. Consistent handwashing with soap — after using the toilet, before handling food, before eating — interrupts the faecal-oral chain for every organism on this list.

When to Seek Medical Review

Most gut infections during the monsoon are viral gastroenteritis — unpleasant, short-lived, manageable with oral rehydration salts and rest. But certain symptoms call for a doctor within 24 to 48 hours, not after a week of watching: yellowing of the eyes or skin (jaundice), dark urine the colour of tea or cola, high fever with abdominal pain, bloody diarrhoea, or inability to keep any fluids down for more than a day.

If you are already under hepatology care — managing cirrhosis, recovering from a transplant, or on immunosuppression for any reason — the threshold is lower still. Do not wait for symptoms to worsen before making contact. A same-day call to your physician’s office is appropriate for any gastrointestinal illness that develops during the monsoon months, even if it initially seems mild. This is one of those situations where early intervention is genuinely easier than managing the consequences of delay.

If you are looking for a specialist opinion on unusual or persistent liver symptoms, or need to establish care with a hepatologist before the rains worsen, the full range of hepatology services at Gleneagles Hospital, Mumbai is available for consultation — in person and via secure video for patients outside the city.