Studis on the Frog Trypanosome (I)

Especially on the Frequency of Frogs infected with Trypanosome

Abstract

Studies are made on the frogs infected with Trypanosome. Among the Rana nigromain Osaka Prefecture, trypanosome can be found in the rate of ca.40% (32.2% by Okada,44.2% by Yabuuchi), but on the younger and smaller frogs (under 2.9 cm), trypanosome is rarely found in their blood.
Morphologically, T. costatum (25.3%) is found more frequently than T. rotatorium (16.3%).
No trypanosome is found in the blood of Rana temporaria and R. nigromaculata brevipoda.