Waterborne Diseases: Causes, Symptoms & Prevention

Recent health reports from Kerala brought attention to a rare yet serious infection called Primary Amoebic Meningoencephalitis (PAM). This condition is caused by the amoeba Naegleria fowleri and occurs when contaminated water enters the body through the nose often during swimming in untreated freshwater.

Although extremely rare, such cases highlight a much broader public health concern: unsafe water exposure.

Around the same time, a water contamination incident in Indore led to widespread gastrointestinal illness after residents consumed polluted municipal water. While these incidents differ in severity, they point to a shared issue poor water safety and sanitation.

In countries like India, factors such as rapid urbanisation, ageing pipelines, flooding, and inadequate sanitation systems contribute to water contamination. As a result, millions remain at risk of diseases ranging from mild infections to life-threatening conditions like Cholera and Hepatitis A.

Understanding how waterborne diseases spread and how to prevent them is key to protecting both individuals and communities.

What Are Waterborne Diseases?

Waterborne diseases are infections caused by harmful microorganisms present in contaminated water. These pathogens typically enter the body through:

• Drinking unsafe water
• Eating food prepared with contaminated water
  

To understand the full impact, refer to our detailed guide on waterborne diseases, their causes, symptoms, and prevention, we explain how to stay protected.

Common Disease Causing Agents:

• Bacteria: Vibrio cholerae, Salmonella typhi
• Viruses: Hepatitis A and E viruses
• Parasites: Entamoeba histolytica

Causes of Water Contamination:

• Poor sanitation infrastructure
• Leakage between sewage and drinking water pipelines
• Flooding and environmental pollution
• Unsafe water storage practices
• Lack of access to clean drinking water

How Do Waterborne Diseases Spread?

These infections spread when contaminated water is used in daily activities such as drinking, cooking, or washing food.

Common Transmission Routes:

• Drinking contaminated water
• Consuming improperly washed food
• Poor hygiene practices
• Contaminated municipal water supply
• Unsafe storage of drinking water

During floods or outbreaks, contamination spreads more rapidly, increasing infection risks.

While most infections occur through ingestion, rare conditions like PAM happen when contaminated water enters the nose during swimming.

Common Waterborne Diseases

1. Cholera

• Cause: Vibrio cholerae
• Symptoms: Severe watery diarrhea, vomiting, dehydration, muscle cramps
• Spread: Contaminated water or food
• Treatment:
  • Oral Rehydration Solution (ORS)
  • IV fluids (in severe cases)
  • Antibiotics (if required)

2. Typhoid Fever

• Cause: Salmonella Typhi
• Symptoms: High fever, fatigue, abdominal pain, headache, loss of appetite
• Spread: Contaminated food and water
• Treatment:
  • Doctor-prescribed antibiotics
  • Adequate hydration
  • Fever monitoring

3. Hepatitis A & E

• Cause: Viral infection
• Symptoms: Jaundice, nausea, fatigue, dark urine, abdominal discomfort
• Spread: Contaminated food and water
• Treatment:
  • Supportive care
  • Hydration and rest
  • Liver monitoring in severe cases

4. Diarrhea

One of the most common outcomes of waterborne infections, especially in children.

• Symptoms: Loose stools, cramps, dehydration
• Treatment:
  • ORS
  • Zinc supplements (for children)
  • Medical care if needed

5. Dysentery

• Cause:
  • Bacterial (Shigella)
  • Parasitic (Entamoeba histolytica)
• Symptoms: Blood in stool, fever, severe cramps
• Treatment:
  • Antibiotics or antiparasitic drugs
  • Hydration therapy

6. Gastroenteritis

• Cause: Viruses, bacteria, or parasites
• Symptoms: Diarrhea, vomiting, fever, stomach cramps
• Treatment:
  • Hydration
  • Rest
  • Medical consultation if prolonged

Common Symptoms to Watch For

Most waterborne diseases share overlapping symptoms:

• Diarrhea
• Vomiting
• Abdominal pain
• Fever
• Nausea
• Fatigue
• Dehydration

Seek Medical Attention If You Notice:

• Persistent vomiting
• Blood in stool
• Severe dehydration
• High fever
• Confusion or weakness

How to Prevent Waterborne Diseases

1. Drink Safe Water

• Boil, filter, or disinfect water before use
• Use water purification tablets when needed

2. Maintain Hand Hygiene

• Wash hands with soap before eating and after using the toilet
• Use hand sanitizers when soap is unavailable

3. Follow Safe Food Practices

• Wash fruits and vegetables thoroughly
• Avoid street food in unhygienic conditions
• Cook food properly
• Avoid raw or undercooked seafood

4. Store Water Properly

• Use clean, covered containers
• Avoid touching stored water with unclean hands
• Clean storage vessels regularly

5. Improve Sanitation

• Proper sewage disposal
• Safe waste management
• Regular water quality monitoring
• Public awareness on hygiene

Conclusion

Most waterborne diseases are highly preventable. Simple steps like drinking safe water, maintaining hygiene, and using proper sanitation practices can significantly reduce health risks.

To stay informed and protect your family, read our complete guide on waterborne diseases, symptoms, and prevention tips.