Question

Disease caused by female Culex is
a. Filaria
b. Pneumonia
c. Malaria
d. Typhoid

Answer 1

Hint: Culex mosquito causes arbovirus infections, it is the genus where they serve as a vector for the disease cycle affecting humans, birds, dogs, and all other animals. They are not able to cause disease in the host in extreme northern parts of the temperate zone.

Complete answer:
- Female culex causes arbovirus infections among which Filaria is one of them.
- It measures 4-10 mm in size.
- Mosquito is anophile or culicine, anophile have paps which is common in the female mosquito.
- Filariasis is a disease caused by the nematode infections, it is a parasitic disease caused by the roundworms.
- Culex act as a vector for the disease, to transport and spread disease in various kind of host
- A most common symptom of the disease is the formation of elephantiasis, where one leg is swelled and becomes big, fat which can be compared to elephant foot.
- This disease effect can be seen in vulva, breast, leg, arms, etc.
- It is diagnosed by Giemsa stained under microscopy.
- It is transmitted in a particular way that is in the intermediate host, the microfilariae moult and become third-degree (infective) larvae.
- Upon taking another blood meal, the vector insect, including Culex pipiens, injects the infectious larvae into the epidermis layer of the pores and skin.
- After approximately 365 days, the larvae moult through extra levels, maturing into the adult worms.

Hence, the correct answer is option (A).

Note: Filaria is treated with albendazole combined with ivermectin but they do not affect adult worms So, the infection by the adult worm is treated with the help of Diethylcarbamazine-medicated salt. For curing the disease proper hygiene is the most important factor.