Ct. Mcallister et al., SARCOCYSTIS SP (APICOMPLEXA) FROM THE NEW-MEXICO RIDGENOSE RATTLESNAKE, CROTALUS-WILLARDI-OBSCURUS (SERPENTES, VIPERIDAE) FROM SONORA, MEXICO, Journal of the Helminthological Society of Washington, 63(1), 1996, pp. 128-130
Two of 4 New Mexico ridgenose rattlesnakes, Crotalus willardi obscurus
Harris, 1974, from Sonora, Mexico, were found to be passing oocysts a
nd free sporocysts of a Sarcocystis sp. in their feces. Sporocysts mea
sured 11.9 x 10.3 (11.0-13.6 x 9.6-11.2) mu m (N = 20) and had a shape
index (length/width) of 1.15 (1.07-1.23). Attempts to transmit the Sa
rcocystis sp. experimentally to Mus musculus, Peromyscus leucopus, or
Microtus ochrogaster were unsuccessful. This represents the first repo
rt of a parasite from this host.