Habitat.—Soil, water, intestinal canal of man and other animals.
Natural vectors.—Blaberus craniifer, U.S.A. (Wedberg et al., 1949): From feces.
Blattella germanica, U.S.A. (Janssen and Wedberg, 1952): From intestinal canal and feces.
Periplaneta americana, U.S.A. (Bitter and Williams, 1949): From intestinal tract.
Escherichia intermedium (Werkman and Gillen) Vaughn and Levine
Habitat.—Soil, water, intestinal canal of man and other animals.
Natural vectors.—Periplaneta americana, U.S.A. (Bitter and Williams, 1949): From intestinal canal.
* Klebsiella pneumoniae (Schroeter) Trevisan
Experimental vectors.—Blatta orientalis, Italy (Cao, 1898).