Host-induced morphological changes of Schistosoma mansoni Sambon, 1907 male worms

Memórias do Instituto Oswaldo Cruz

José Roberto Machado-silva²  Cleber Galvão¹  Octavio Augusto França Presgrave¹  Luis Rey¹  Delir Corrêa Gomes¹ 

[1] ,UERJ Faculdade de Ciências Médicas Departamento de Patologia e LaboratóriosRio de Janeiro,Brasil

关键词: Schistosoma mansoni;    morphology;    strains;    Nectomys squamipes;    sw mice;   

DOI  :  10.1590/S0074-02761994000300021

来源: SciELO

【 摘 要 】

In order to evaluate the permissiveness of Nectomys squamipes to Schistosoma mansoni and the influence of the albino mice on the morphological aspects of adult worms derived from a population isolated from N. squamipes, the morphology of adult S. mansoni Sambon, 1907 male worms was studied using a digital image analyser (MOP VIDEOPLAN) and light microscopy. Their sources were as follows: (1) recovered from the wild rodent N. squamipes Brants naturally infected from Sumidouro, RJ, Brazil; (2) recovered from albino mice experimentally infected with the strain derived from N. squamipes; (3) recovered after the isolation of a strain derived from aboriginal human infections in Sumidouro. Worms recovered from N. squamipes (group 1) showed body lenght and distance between suckers significantly bigger than those of the specimens maintained in mice (groups 2 and 3). The number of tests in group 1 was statistically less than of groups 2 and 3. Group 2 strains which were maintained in mice, presented the lenght of the worms as the only significant different character. Data show that: (1) N. squamipes is a more suitable host for the development of S. mansoni when compared to the albino mice; (2) a strain of S. mansoni isolated from a natural host undergoes morphological changes after its passage in the white mouse.

【 授权许可】

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