Identify the site where Wuchereria bancrofti is normally found in the human body:

Explanation

Wuchereria bancrofti is a dreaded human parasite. It is a digenetic parasite completing its life cycle in two hosts the final host is man harboring the adult worm. The disease passes through four stages in human beings: In the first stage, the patient has increased eosinophils, and enlarged lymph nodes. The second or carrier stage is symptomless. The third stage is characterized by filarial fever, inflammation of lymph nodes (lymphadenitis) and lymph vessels (lymphangiectasis), and reversible lymphoedema(excess fluid in tissues due to 387 obstruction of lymph vessels) in various body parts. The fourth or final stage is manifested by lymphoedema accompanied by thickening of subcutaneous tissues and skin so that there is permanent swelling mostly of feet, legs, thighs, scrotal sacs, breast, etc. It is called elephantiasis.