Cockroaches, U.S.A. (Longfellow, 1913).
Experimental vectors.—Blattella germanica, Germany (Vollbrechtshausen, 1953): When injected anally or orally the bacteria invaded the intestinal cells and in heavy infections killed the cockroaches.
Escherichia coli var. acidilactici (Topley and Wilson) Yale
Synonymy.—Bacillus acidi lactici.
Source.—Diseased nun moth larvae.
Experimental vectors.—Blatta orientalis, Europe (Filatoff, 1904): Organism pathogenic to cockroach when injected but not when fed.
Escherichia coli var. communior (Topley and Wilson) Yale
Natural vectors.—Blaberus craniifer, U.S.A. (Wedberg et al., 1949): From feces.