Natural vectors.—Blatta orientalis, Italy (Spinelli and Reitano, 1932): From intestinal tract.
Lactobacillus fermenti Beijerinck
Habitat.—Fermenting plant or animal products.
Natural vectors.—Blatta orientalis, Poland (Nicewicz et al., 1946): From intestinal canal.
† Pneumococcus Type I, No. 1231
Experimental vectors.—Blattella germanica, Germany (Vollbrechtshausen, 1953).
* Streptococcus faecalis Andrewes and Horder
Natural vectors.—Blatta orientalis, Poland (Nicewicz et al., 1946).
Blattella germanica, U.S.A. (Steinhaus, 1941).
Periplaneta americana? ("Blatella americana"), England (Shrewsbury and Barson, 1948).