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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 105, No. 2, 2010, pp. 149-154
Bioline Code: oc10026
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 105, No. 2, 2010, pp. 149-154

 en Inheritance of Schistosoma mansoni check for this species in other resources infection incompatibility in Biomphalaria alexandrina check for this species in other resources snails
El Naga, Iman F. Abou; Eissa, Maha M.; Mossallam, Shereen F. & El-Halim, Safaa I. Abd

Abstract

In this study, we looked at the inheritance of susceptibility and resistance to Schistosoma mansoni check for this species in other resources infection in the first generation of crossbred Biomphalaria alexandrina check for this species in other resources snails. Our ultimate goal is to use such information to develop a biological method of controlling schistosomiasis. We infected laboratory-bred snails with S. mansoni miracidia and examined cercarial shedding to determine susceptibility and resistance. Five parental groups were used: Group I contained 30 susceptible snails, Group II contained 30 resistant snails, Group III contained 15 susceptible and 15 resistant snails, Group IV contained 27 susceptible and three resistant snails and Group V contained three susceptible and 27 resistant snails. The percentage of resistant snails in the resulting progeny varied according to the ratio of susceptible and resistant parents per group; they are 7%, 100%, 68%, 45% and 97% from Groups I, II, III, IV and V, respectively. On increasing the percentage of resistant parent snails, the percentage of resistant progeny increased, while cercarial production in their susceptible progeny decreased.

Keywords
Schistosoma mansoni, Biomphalaria alexandrina, susceptibility, resistance, biological control

 
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