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Egypt. J. Exp. Biol. (Zoo.). 2014; 10(1): 67-70


COMPARATIVE SUSCEPTIBILITY OF AUTOGENOUS AND ANAUTOGENOUS AEDES CASPIUS PALLAS (DIPTERA: CULICIDAE) TO FILARIA PARASITE WUCHERERIA BANCROFTI (FILARIIDEA: DIPETALONEMATIDAE)

Belal A. Soliman Nahla M. Wassim Maha K. Tewfick.

Abstract
Autogenous and anautogenous forms of Aedes (Ae.) caspius were evaluated for their ability to support the development of the human filarial parasite Wuchereria (W.) bancrofti. Female mosquitoes were allowed to feed on human microfilaremic volunteer circulating 35 microfilariae (mf)/ 50 l blood. The two forms showed different patterns in acquiring filarial infection (40 and 61.5% in the autogenous and anautogenous forms respectively). Anautogenous females ingested twice the microfilariae number ingested by autogenous ones. The mortality rate of autogenous females (75.4%) was higher than that of anautogenous females (57.9%). Both autogenous and anautogenous forms of Ae. caspius failed to support the development of the filarial parasite. However, few females supported the development of few numbers of immature stages of W. bancrofti. Only 4 out of 25 infected autogenous and 3 out of 27 infected anautogenous female mosquitoes were found harbouring infective L3 filarial larvae. The results of comparison on susceptibility of autogenous and anautogenous forms indicated that both forms of Ae. caspius yielded similar high refractoriness for developing W. bancrofti parasite. The autogenous and anautogenous forms of Ae. caspius are incapable of transmitting W. bancrofti parasite in Egypt.

Key words: Mosquitoes, Aedes caspius,Susceptibity, Filarial infection, Wuchereria bancrofti



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