"Colon bacilli"
Natural vectors.—Cockroaches [presumably Blatta orientalis, Blattella germanica, and/or Periplaneta americana], Egypt (El-Kholy and Gohar, 1945): From the outer surface, intestinal tract, and suspensions of macerated insects.
"Diplococci"
Natural vectors.—Blatta orientalis, Germany (Jettmar, 1935): From intestinal tract.
Blattella germanica, Germany (Jettmar, 1935): From outer surface of body.
"Diphtheroid I and II"
Source.—Periplaneta americana.
Natural and experimental infections.—Periplaneta americana, U.S.A. (Gier, 1947): Pathogenicity to the cockroach variable when organism injected.
"Gram positive rods"
Source.—Feces of Blattella germanica.