Toxoplasma gondii isolates of free-ranging chickens from Rio de Janeiro, Brazil:: Mouse mortality, genotype, and oocyst shedding by cats

被引：78

作者：

Dubey, JP

Graham, DH

da Silva, DS

Bahia-Oliveira, LMG

机构：

[1] USDA ARS, Anim & Nat Resources Inst, Anim Parasit Dis Lab, Beltsville, MD 20705 USA

[2] Ctr Dis Control & Prevent, Div Parasit Dis, Atlanta, GA 30341 USA

来源：

JOURNAL OF PARASITOLOGY | 2003年 / 89卷 / 04期

关键词：

D O I：

10.1645/GE-60R

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：

Most isolates of Toxoplasma gondii can be grouped into 3 genetic lineages. In the present Study, 67 isolates of T. gondii were obtained by bioassay in mice inoculated with brains and hearts of 96 asymptomatic chickens from an area highly endemic to human infection in Rio de Janeiro, Brazil. Of the 48 isolates genotyped using the SAG, locus, 34 (70%) were of type I and 13 (27%) were of type III. No isolate of type 11 was recovered. Isolates from I chicken contained a type I and type III mixed infection, indicating natural multiparasite infection in the same animal. Cats fed mice infected with I I type I strains shed 19-535 million oocysts in their feces, indicating that type I isolates can circulate in the environment.

引用

页码：851 / 853

页数：3

共 26 条

[1] Chronic infection with Toxoplasma gondii does not prevent acute disease or colonization of the brain with tissue cysts following reinfection with different strains of the parasite [J].