SciELO - Scientific Electronic Library Online

vol.30 issue4Descrição da colonização de Aedes aegypti na região de São José do Rio Preto, São Paulo author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista da Sociedade Brasileira de Medicina Tropical

Print version ISSN 0037-8682On-line version ISSN 1678-9849


GUIMARAES, Carlos Tito; SOARES, Delza de Moura; ANDRADE, Zilton de Araújo  and  SOUZA, Cecília Pereira de. Resistência de Biomphalaria glabrata à infecção pelo Schistosoma mansoni: variações no período pré-patente e na compatibilidade. Rev. Soc. Bras. Med. Trop. [online]. 1997, vol.30, n.4, pp.273-278. ISSN 0037-8682.

Biomphalaria glabrata from Belo Horizonte, Minas Gerais, Brazil, reared in laboratory, has a level of infection of 90% when exposed to 20 miracidia of the autochthonous LE strain. The prepatent period was of 5 to 7 weeks whereas 5 to 10 % of exposed snails do not shed cercariae. The eggs of negative snails were collected and the progeny was again submitted to individual infection with 20 miracidia. The mean of infection from F14 to F20 was of 43.6%. Histological sections from F12, F14 and F15 snails showed tissue reactions in those specimens shedding less than 10 cercariae. A prepatent period of 17 to 32 weeks was observed in 35 (17.9%) of 195 infected snails. The index of cercariae of control was extremely compatible and for F12, F13 and F15 snails varied from very compatible class V to compatible class III, showing less compatibility in selected snails.

Keywords : Biomphalaria glabrata; Resistance; Compatibility; Schistosoma mansoni.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License