DISTRIBUTION OF SCHISTOSOME GENETIC DIVERSITY WITHIN MOLLUSCAN INTERMEDIATE HOSTS

被引:70
作者
MINCHELLA, DJ
SOLLENBERGER, KM
DESOUZA, CP
机构
[1] Department of Biological Sciences, Purdue University, West Lafayette
[2] CPRR, FIOCRUZ, Belo Horizonte, MG
关键词
GENETIC DIVERSITY; OVERDISPERSION; MOLLUSCAN HOST; SCHISTOSOMA MANSONI;
D O I
10.1017/S0031182000064970
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
Naturally 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.
引用
收藏
页码:217 / 220
页数:4
相关论文
共 14 条
[1]  
Bell G., 1982, MASTERPIECE NATURE
[2]   SCHISTOSOMA-MANSONI - BIOMPHALARIA-GLABRATA - DYNAMICS OF THE SPOROCYST POPULATION IN RELATION TO THE MIRACIDIAL DOSE AND THE HOST SIZE [J].
GERARD, C ;
MONE, H ;
THERON, A .
CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE, 1993, 71 (09) :1880-1885
[3]   ANTIGENIC DIVERSITY AND THE TRANSMISSION DYNAMICS OF PLASMODIUM-FALCIPARUM [J].
GUPTA, S ;
TRENHOLME, K ;
ANDERSON, RM ;
DAY, KP .
SCIENCE, 1994, 263 (5149) :961-963
[4]   BIASED SEX-RATIOS AND PARASITE MATING PROBABILITIES [J].
MAY, RM ;
WOOLHOUSE, MEJ .
PARASITOLOGY, 1993, 107 :287-295
[5]   GENETIC DIVERSITY OF SCHISTOSOMA-MANSONI - QUANTIFYING STRAIN HETEROGENEITY USING A POLYMORPHIC DNA ELEMENT [J].
MINCHELLA, DJ ;
LEWIS, FA ;
SOLLENBERGER, KM ;
WILLIAMS, JA .
MOLECULAR AND BIOCHEMICAL PARASITOLOGY, 1994, 68 (02) :307-313
[6]   STUDIES ON THE SEX-RATIO OF WORMS IN SCHISTOSOME INFECTIONS [J].
MITCHELL, GF ;
GARCIA, EG ;
WOOD, SM ;
DIASANTA, R ;
ALMONTE, R ;
CALICA, E ;
DAVERN, KM ;
TIU, WU .
PARASITOLOGY, 1990, 101 :27-34
[7]   MATHEMATICAL-MODEL FOR STUDYING GENETIC-VARIATION IN TERMS OF RESTRICTION ENDONUCLEASES [J].
NEI, M ;
LI, WH .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1979, 76 (10) :5269-5273
[8]   SUPERINFECTION AND THE EVOLUTION OF PARASITE VIRULENCE [J].
NOWAK, MA ;
MAY, RM .
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 1994, 255 (1342) :81-89
[9]  
Rollinson D., 1985, Linnean Society Symposium Series, P91
[10]  
Sokal R.R., 1981, BIOMETRY