Parasitological and morphological characteristics of Brazilian strains of Schistosoma mansoni in Mus musculus

Revista da Sociedade Brasileira de Medicina Tropical

Machado-Silva, José Roberto¹  Neves, Renata Heisler¹  Rey, Luís¹  Oliveira, Regina Maria Figueiredo de¹  Martinez, Elaine Machado¹  Universidade do Estado do Rio de Janeiro, Rio de Janeiro¹  Fundação Oswaldo Cruz, Rio de Janeiro¹ 

关键词: Schistosoma mansoni;    Strains;    Parasitological study;    Morphology;    Mus musculus;   

DOI  :  10.1590/S0037-86822003000500003

学科分类：农业科学（综合）

来源: Sociedade Brasileira de Medicina Tropical

【 摘 要 】

Aiming to determine parasitological and morphological differences between Brazilian strains (CMO, CM and BE) of Schistosoma mansoni the following parameters were studied: prepatent period, kinetics of egg releasing in feces, intestinal oogram, infectivity and the morphology of adult worms. No statistical difference (p>0.05) was found regarding the mean prepatent period (44 and 46 days) and infectivity (26% and 29%). All strains showed a higher concentration of trapped eggs in the small intestine than large intestine (p<0.05). All characteristics of the reproductive system and suckers of male worms presented significant differences (p<0.05). CMO strain was smaller in all measurements. Females showed significant differences (p<0.05) in the larger diameter of the eggs, in the area and perimeter of the spine egg and in the oral sucker area. We conclude that differences in strains can be expressed even when the strains have been cycled for several generations under laboratory conditions.

【 授权许可】

Unknown