Question

How does elephantiasis (Filariasis) occur?

Hint:

Prevention involves controlling mosquito populations and using insect repellent to avoid bites.

Answer 1

Step 1: What is Elephantiasis (Filariasis)?
Elephantiasis, also known as filariasis, is a disease caused by parasitic worms, primarily Wuchereria bancrofti and Brugia malayi, which are transmitted through mosquito bites.
Step 2: How the Disease Occurs.
1. Mosquito Transmission: The female mosquito carrying the filarial larvae bites a human, introducing the larvae into the bloodstream. 2. Larvae Development: The larvae travel through the bloodstream to the lymphatic system, where they mature into adult worms. 3. Blockage of Lymphatic Vessels: The adult worms cause blockages in the lymphatic system, leading to fluid accumulation and swelling in the affected body parts, commonly the legs.
Step 3: Symptoms and Effects.
The disease causes extreme swelling (elephantiasis) and can lead to permanent disability if not treated.
Step 4: Conclusion.
Thus, elephantiasis occurs due to parasitic infections transmitted by mosquito bites, leading to lymphatic system damage.
Final Answer: \[ \boxed{\text{Elephantiasis is caused by filarial worms transmitted through mosquito bites, affecting the lymphatic system.}} \]