Habitat.—Blatta orientalis, England (Dobell, 1912); U.S.S.R.? Zasukhin (1930): From intestinal tract.
Unidentified spirochaetes
Habitat.—Blatta orientalis, U.S.S.R. (Yakimov and Miller, 1922): Spirochaetes and spirilla were found in the intestines of 70 percent of 124 specimens collected in Petrograd.
Periplaneta americana, Gold Coast Colony (Macfie, 1922).
ADDITIONAL BACTERIA WHOSE TAXONOMIC POSITION IS UNKNOWN
* "B. aerobio del pseudoedema maligno" of Cao
Natural vectors.—Blatta orientalis, Italy (Cao, 1906).
B. alcaligenes beckeri
Natural vectors.—Blatta orientalis, Poland (Nicewicz et al., 1946): Isolated from intestinal tract.