What Is Hepatitis A?
Hepatitis A is a liver disease caused by infection with the Hepatitis A virus (HAV). The virus spreads through the fecal–oral route, meaning that it is transmitted when a person consumes food or water contaminated with the feces of an infected individual. Once inside the body, the virus infects the liver and causes inflammation (hepatitis).
Hepatitis A usually causes acute hepatitis, and most people recover completely within a few weeks as their immune system clears the virus. Recovery results in lifelong immunity against future Hepatitis A infection. However, in rare cases, the disease can progress to acute liver failure (fulminant hepatitis), which is a life-threatening medical emergency.
At a Glance
Cause
Infection with the Hepatitis A virus (HAV)
Route of Spread
Fecal–oral, via contaminated food or water
Typical Course
Usually acute hepatitis, resolving in a few weeks
After Recovery
Lifelong immunity against future Hepatitis A infection
How Does Hepatitis A Spread?
Hepatitis A is primarily transmitted through contaminated food and water. Common modes of transmission include:
- Consuming contaminated food or drinking water
- Poor sanitation and inadequate sewage disposal systems
- Poor personal hygiene, particularly not washing hands properly after using the toilet
- Eating uncovered or unhygienically prepared street food
- Drinking sugarcane juice or other beverages prepared under unhygienic conditions
- Poor food handling practices in restaurants and food establishments, including failure to maintain hygiene or use gloves when necessary
- Living or eating in overcrowded environments with poor sanitation, such as schools, hostels, military barracks, prisons, and refugee camps
- Sexual contact with an infected person
- Men who have sex with men (MSM)
Who Is at Higher Risk?
Hepatitis A is more common among:
Children, particularly those under 15 years of age (approximately 90% of infections occur in this age group in highly endemic areas).
Travelers visiting regions where Hepatitis A is common.
People living in communities with poor sanitation.
Individuals during periodic community outbreaks.
People living in overcrowded settings with inadequate hygiene.
Regions with High Hepatitis A Prevalence
Hepatitis A is more common in:
The Indian subcontinent, including Bangladesh, India, Nepal, and Pakistan.
North Africa and Sub-Saharan Africa.
The Middle East.
China.
Parts of Eastern Europe.
Global Burden of Hepatitis A
Reliable national data on the burden of Hepatitis A in Bangladesh remain limited, but its global impact on liver health is well documented.
- According to the World Health Organization (WHO), Hepatitis A remains a significant public health concern worldwide.
- The disease contributes to a small proportion of deaths related to viral hepatitis globally.
- Co-infection with Hepatitis E, Hepatitis B, or Hepatitis C may increase the risk of severe illness and complications.
- Reliable national data on the burden of Hepatitis A in Bangladesh remain limited.
What Symptoms Should You Watch For?
Symptoms usually appear 2 to 6 weeks after exposure to the virus. Common symptoms include:
Diagnosis
Your doctor may recommend the following tests:
Blood Tests
- Bilirubin
- ALT (Alanine Aminotransferase)
- AST (Aspartate Aminotransferase)
- Alkaline Phosphatase (ALP)
- Anti-HAV IgM antibody (confirms recent Hepatitis A infection)
- Complete Blood Count (CBC)
- Prothrombin Time (PT)
- Activated Partial Thromboplastin Time (APTT)
- International Normalized Ratio (INR)
Imaging
- Abdominal ultrasound may help identify liver enlargement and assess liver condition.
Treatment
There is no specific antiviral treatment for Hepatitis A. Management focuses on:
- Adequate rest
- Proper hydration
- Nutritional support
- Treatment of symptoms
- Regular medical follow-up
Most patients recover within 1 to 3 weeks, although complete recovery may occasionally take up to 12 weeks.
Important: Avoid taking unnecessary medications during Hepatitis A infection. In particular, paracetamol (acetaminophen) should not be used without medical advice, as it may worsen liver injury in susceptible patients.
Possible Complications
Although most people recover completely, complications may occur, including:
- Impaired liver function
- Coagulopathy (blood clotting abnormalities)
- Disseminated Intravascular Coagulation (DIC)
- Septicemia
- Hepatorenal syndrome (kidney dysfunction associated with liver disease)
- Acute liver failure (Fulminant Hepatitis)
Acute liver failure is a medical emergency requiring intensive supportive care. If liver function cannot be restored, emergency liver transplantation may be the only life-saving treatment.
Prevention
Hepatitis A can largely be prevented by maintaining good hygiene and receiving vaccination. Preventive measures include:
- Practice good personal hygiene
- Wash hands thoroughly before eating and after using the toilet
- Drink safe and clean water
- Ensure proper sewage and sanitation systems in the community
- Receive the Hepatitis A vaccine
- Get vaccinated before traveling to countries where Hepatitis A is common
- Practice safe sex
Hepatitis A Vaccination
The Hepatitis A vaccine is highly effective. A single dose provides protective immunity in most healthy individuals within one month, while many national immunization schedules recommend a two-dose series for long-term protection, depending on the vaccine used.
Key Facts to Remember
- Hepatitis A is a food- and water-borne viral infection.
- Good hygiene and safe sanitation are the most effective ways to prevent infection.
- Seek medical advice promptly if symptoms of Hepatitis A develop.
- Do not take paracetamol (acetaminophen) or other medications without consulting your doctor.
- Early supportive treatment helps reduce the risk of severe complications, including acute liver failure.