Question

Intermediate host of Wuchereria bancrofti is?
A.Male Anopheles
B.Male Culex
C.Female Culex
D.None of these

Answer 1

Hint: Wuchereria bancrofti is a worm that is found in the lymph nodes of humans which causes lymphatic filariasis called Bancroft's filariasis. Only humans are the known hosts for this worm. It is found in the warm regions of the world and it is also found throughout Africa, South-eastern Asia, South, the Pacific islands, and the subtropical and tropical regions. They are thread-like with a very smooth cuticle and have blunt round ends.

Complete answer:Male Anopheles- Male mosquitoes just live only for one week in the wild as well as in laboratory conditions. Males do not feed on mammalian blood like female mosquitoes. They use their feeding tubes to drink nectar from flowers. Males can be distinguished easily from females by using hand magnifiers.
Male Culex- This belongs to the genus of mosquitoes; these act like vectors for birds, animals, and humans to transmit diseases. The disease which they carry includes arbovirus infections like West Nile virus, St.Louis encephalitis, Japanese encephalitis, and also filariasis and avian malaria.
Hence the correct option is C, Female Culex.

Additional information:
Bancroftian filariasis accounts for 90 percent of the lymphatic filariasis case and is one of the most commonly acquired lymphedema. It is the second most leading infectious cause of disability worldwide after leprosy. This disease primarily involves the lymphatic system with clinical symptoms ranging from acute adenolymphangitis, fever, and pulmonary eosinophilia to chronic elephantiasis, lymphedema, and hydrocele.

Note: Wuchereria bancrofti has a life cycle that is carried out in two hosts. Humans are the definite hosts and mosquitoes are the intermediate hosts. Mosquitoes are the vector for them. The most commonly used mosquito vectors are the genus of Culex, Anopheles, and Mansonia, and the female mosquito acts as a vector for the intermediate hosts.