In the life history of mosquito there are four stages namely—egg, larva, pupa and imago or adult. (a) Egg: After sexual union the female mosquito lays about 200-400 fertilised eggs in shallow stagnant water. The eggs of Anopheles and Aedes float separately in the water, but the eggs of Culex remain together and float as a single unit. The individual [...]
The upcoming discussion will update you about the difference between classical and occult filariasis. Difference # Classical Filariasis: i. Cause: Growing worms and adults. ii. Basic lesions: An acute inflammation followed by an epitheloid granuloma surrounding the adult worm of W. bancrofti. iii. Organs concerned: Lymphatic system (i.e., lymph vessel and lymph node) iv. Microfilaria: Present in peripheral blood circulation. [...]
The below mentioned article provides notes on tsetse flies as vectors. Tsetse flies are of paramount importance in Africa because of their role as vectors of trypano some infections of man and domestic animals, which have had a profound effect on the economy and development of that continent (Fig. 15.17). The tsetse flies are elongated dark brown or yellowish-brown flies. [...]