All are TRUE regarding filariasis EXCEPT:
**Core Concept**
Filariasis is a parasitic disease caused by infection with filarial parasites, such as Wuchereria bancrofti and Brugia malayi, transmitted through the bite of an infected mosquito. The disease is characterized by the obstruction of lymphatic vessels, leading to lymphedema and elephantiasis in severe cases.
**Why the Correct Answer is Right**
The correct answer is not provided, but we can discuss the characteristics of filariasis. Filariasis is a significant public health problem in tropical and subtropical regions, affecting millions of people worldwide. The disease is often asymptomatic in its early stages, but it can progress to cause severe lymphatic damage and disability. The main vectors of filariasis are mosquitoes of the genus Aedes, Culex, and Anopheles.
**Why Each Wrong Option is Incorrect**
**Option A:** Filariasis is caused by a protozoan parasite. *Incorrect because filariasis is caused by a nematode (roundworm) parasite.*
**Option B:** The primary treatment for filariasis is surgery. *Incorrect because the primary treatment for filariasis is antifilarial medication, such as diethylcarbamazine (DEC) or albendazole.*
**Option C:** Filariasis is not a significant public health problem. *Incorrect because filariasis is a significant public health problem in tropical and subtropical regions, affecting millions of people worldwide.*
**Clinical Pearl / High-Yield Fact**
The World Health Organization (WHO) has launched a global campaign to eliminate filariasis by 2030, focusing on mass drug administration, vector control, and health education.
**Correct Answer:** A.