Polio
Explanation
Waterborne diseases are caused by pathogenic microorganisms-such as viruses, bacteria, and protozoa-that are transmitted through contaminated water. These pathogens usually enter water bodies through fecal contamination due to inadequate sanitation.
- Asthma is incorrect: Asthma is a chronic non-communicable respiratory condition affecting the airways. It is triggered by environmental factors such as allergens (pollen, dust mites), air pollution, and smoke, rather than water contamination.
- Polio is correct: Polio (Poliomyelitis) is a highly infectious viral disease caused by the poliovirus. It is primarily transmitted via the fecal-oral route. The virus multiplies in the intestine and is excreted in feces, which can contaminate water supplies in areas with poor sanitation. Consuming this contaminated water leads to infection.
- Measles is incorrect: Measles is a highly contagious viral disease transmitted through direct contact or through the air via respiratory droplets from coughing or sneezing. It is not transmitted through water.
- Diabetes is incorrect: Diabetes is a chronic metabolic disease characterized by elevated blood sugar levels. It is a non-communicable disease resulting from genetic factors and lifestyle choices (such as diet and physical inactivity), not from infectious agents in water.
Key Takeaway: Polio is an infectious viral disease transmitted primarily through the fecal-oral route, often involving water sources contaminated by sewage, distinguishing it from airborne diseases like measles or non-communicable diseases like diabetes.