Abstract
Mycoplasmas were isolated from the cojunctivas and nasopharynges of Chinese hamsters. Four clones obtained from 3 separate colonies were examined in detail. These clones were indistinguishable from each other and were serologically distinct from 67 recognized Mycoplasma spp. Strain CH (NCTC 10190) is designated the type strain of a new species, M. cricetuli. This is the only Mycoplasma sp. recorded from Chinese hamsters.