| eimerians in harvest mice, reithrodontomys spp., from mexico, california and new mexico, and phenotypic plasticity in oocysts of eimeria arizonensis. | between may 1979 and august 1991, 48.7% (57/117) of the harvest mice (reithrodontomys spp.) examined from 10 localities in mexico, california and new mexico had coccidian oocysts in their feces. a total of 46.7% (49/105) of the reithrodontomys megalotis examined were positive for coccidian oocysts; this included samples from five states in mexico (47.1%, 8/17), three counties in california (66.7%, 4/6) and two counties in new mexico (45.1%, 37/82); 66.7% (8/12) of the reithrodontomys montanus fr ... | 1992 | 1522549 |