* Shigella paradysenteriae (Collins) Weldin
Natural vectors.—Blatta lateralis, Tadzhikistan (Zmeev, 1940).
Experimental vectors.—Periplaneta americana, Gold Coast Colony (Macfie, 1922).
Polyphaga saussurei, U.S.S.R. (Zmeev in Pavlovskii, 1948).
Cockroaches, Venezuela (Tejera, 1926).
Family PARVOBACTERIACEAE