| caryospora bigenetica (apicomplexa: eimeriidae) in south america: new hosts and distribution records. | the coccidian caryospora bigenetica was first described in the snake crotalus horridus (viperidae) from united states of america. this study represents the first record of the occurrence of c. bigenetica in snakes in south america. feces were sampled between november 2013 and may 2014 from 256 wild snakes maintained in scientific breeding facilities in the states of mato grosso do sul (ms; n = 214) and rio de janeiro (rj; n = 42), brazil. caryospora bigenetica was found in 14 (5.6%) snakes, all ... | 2015 | 25909262 |