Natural vectors.—Blaberus craniifer, U.S.A. (Wedberg et al., 1949).
Blatta orientalis, U.S.A. (Olson and Rueger, 1950).
Blattella germanica, U.S.A. (Olson and Rueger, 1950; Janssen and Wedberg, 1952).
Periplaneta americana, U.S.A. (Bitter and Williams, 1949, 1949a; Olson and Rueger, 1950).
Experimental vectors.—Blattella germanica, U.S.A. (Herms and Nelson, 1913).
Cockroaches, U.S.A. (Longfellow, 1913).
* Pseudomonas eisenbergii Migula
Natural and experimental vectors.—Blatta orientalis, Italy (Cao, 1906).