HOST REACTIONS IN BIOMPHALARIA-GLABRATA TO SCHISTOSOMA-MANSONI MIRACIDIA, INVOLVING VARIATIONS IN PARASITE STRAINS, NUMBERS AND SEQUENCE OF EXPOSURES

被引:19
作者
KASSIM, OO
RICHARDS, CS
机构
[1] Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda
关键词
autoradiography; Biomphalaria glabrata; encapsulation; Schistosoma mansoni; superinfection; susceptibility; tritiated leucine;
D O I
10.1016/0020-7519(79)90013-4
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
M-line Biomphalaria glabrata snails are susceptible to Puerto Rican (PR-1) strain of Schistosoma mansoni, but are resistant to a St. Lucian (LC-1) strain. 10-R2 B. glabrata snails are resistant to both strains of S. mansoni. When 10-R2 snails were exposed repeatedly to PR-1 S. mansoni miracidia for 5 consecutive days, all of the sporocysts were encapsulated and destroyed by the snails. Thirty-four per cent of sporocysts examined in M-line snails with similar exposures were also degraded. In double concurrent infections of M-line B. glabrata with [3H]leucine-labeled and unlabeled PR-1 and Lc-1 S. mansoni, the incompatible Lc-1 miracidia were selectively attacked and destroyed. This destruction occurred irrespective of the sequence of exposure of the 2 strains of miracidia, and whether or not the miracidia were labeled. Successful superinfection of M-line B. glabrata with homologous S. mansoni miracidia was obtained at least 4 days after the primary exposure to the miracidia. © 1979.
引用
收藏
页码:565 / 570
页数:6
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