Distribution of schistosome genetic diversity within molluscan intermediate hosts

Parasitology - Tập 111 Số 2 - Trang 217-220 - 1995
Dennis J. Minchella1, Kathy M. Sollenberger1, Cecília Pereira de Souza1
1Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA

Tóm tắt

SUMMARYNaturally infected Biomphalaria glabrata snails were collected at two sites near Belo Horizonte, Brazil, and Schistosoma mansoni cercariae isolated from single snails were used to infect individual mice. Genetic comparison of single worm DNA was accomplished by hybridization of Southern blots to a polymorphic repetitive DNA element. Genetic profiles of parasite individuals revealed a diverse array of parasite genotypes in naturally infected intermediate hosts. The observed distribution of schistosome genotypes among intermediate hosts indicates that over half of the infected snails harbour multiple miracidia. Snails were more likely to carry multiple infections than expected by chance. This degree of overdispersion combined with high levels of genetic variability facilitates multi-genotype transmission and helps maintain parasite genetic diversity.

Từ khóa


Tài liệu tham khảo

10.1098/rspb.1994.0012

Wright, 1983, Enzymes in Schistosoma haematobium, Bulletin of the World Health Organization, 61, 307

Sokal, 1981, Biometry

10.1017/S0031182000079713

10.1126/science.8310293

10.1016/0166-6851(94)90175-9

10.1139/z93-268

10.1017/S0031182000079269

Rollinson, 1985, Ecology and Genetics of Host–Parasite Interactions, 91

Bell, 1982, The Masterpiece of Nature: the Evolution and Genetics of Sexuality

10.1016/0020-7519(90)90147-F

10.1080/00222938200770391

10.1073/pnas.76.10.5269

10.1016/0166-6851(91)90172-3

Thông tin
Thông tin xuất bản

Parasitology

Tập 111 Số 2

217-220

Thông tin tác giả