The following points highlight the three major disorders caused due to filarial disease. The disorders are: 1. Elephantiasis 2. Hydrocele 3. Chyluria. Disorder # 1. Elephantiasis: The condition is due to hyperplasia of skin and connective tissue, specially involving scrotum, legs and arms. Elephantiasis is the result in many cases of filariasis where in profuse development of skin occurs on [...]
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. [...]
Sand flies are of great importance as the transmitters of various kinds of leishmaniasis, of a filtrable virus disease called three-day fever or more commonly sand-fly or papatasi fever and of Oroya fever. These are blood sucking flies and they belong to the genus Phlebotomus. These are small, moth like flies, rarely over 5 mm long. Their bodies and wings [...]