Natural vectors.—Blaberus craniifer, U.S.A. (Wedberg et al., 1949).
Blatta orientalis, Italy (Spinelli and Reitano, 1932).
Periplaneta americana, U.S.A. (Bitter and Williams, 1949, 1949a).
Cockroaches, U.S.A. (Longfellow, 1913).
* Proteus spp.
Natural vectors.—Blatta orientalis, U.S.A. (Olson and Rueger, 1950).
Periplaneta americana, U.S.A. (Bitter and Williams, 1949; Olson and Rueger, 1950).
* Salmonella anatis (Rettger and Scoville) Bergey et al.
Natural vectors.—Periplaneta americana, U.S.A. (Eads et al., 1954).