Habitat.—Soil, water, decomposing materials.
Natural vectors.—Periplaneta americana? ("Blatella americana"), England (Shrewsbury and Barson, 1948): From intestinal tract.
Experimental vectors.—Blatta orientalis, Italy (Cao, 1898): Organism recovered, apparently unchanged, from intestinal contents.
† Bacillus monachae (von Tubeuf) Eckstein
Synonymy.—Bacterium monache.
Source.—Diseased larvae of nun moth, Lymantria monacha.
Experimental infection.—Blatta orientalis, Europe (Filatoff, 1904): Organism pathogenic to the cockroach when injected but not when fed.
† Bacillus periplanetae Tichomiroff
Habitat.—Blatta orientalis, U.S.S.R.? (Tichomiroff, 1870[?], in Filatoff, 1904): The infected insects suffered from a diarrhea and the liquid feces were yellow-brown.