BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS III 



Alcaligenes faecalis Castellani and Chalmers 



Synonymy. — Bacillus faecalis alkaligenes; Bacillus alcaligenes fae- 

 calis; B. alcaligenes faecalis. 



Habitat. — Intestinal canal of man. Has been isolated from feces, 

 abscesses related to intestinal canal, and occasionally in the blood- 

 stream. However, it is generally considered nonpathogenic. 



Natural vectors. — Blaherus craniifer, U.S.A. (Wedberg et al., 

 1949) : Isolated from feces. 



Blatta orientalis, Poland (Nicewicz et al., 1946) : Isolated from 

 intestinal tract. 



Blattella germanica, U.S.A. (Janssen and Wedberg, 1952) : From 

 intestinal tract and feces, 



Periplaneta americana, U.S.A. (Bitter and Williams, 1949) : Iso- 

 lated from intestinal tract. 



Cockroaches [presumably Blatta orientalis, Blattella germanica 

 and/or Periplaneta americana], Egypt (El-Kholy and Gohar, 1945) : 

 From suspensions of macerated whole insects. 



Alcaligenes recti (Ford) Bergey et al. 



Synonymy. — B. alcaligenes recti. 

 Habitat. — Intestinal canal. 



Natural vectors. — Blatta orientalis, Poland (Nicewicz et al., 1946) : 

 Isolated from intestinal tract. 



Alcaligenes viscosus (Weldin and Levine) Weldin 



Habitat. — Water, dairy utensils ; produces ropiness in milk. 

 Natural vectors. — Blattella germanica, U.S.A. (Janssen and Wed- 

 berg, 1952) : Isolated from intestine and feces. 



Family ENTEROBACTERIACEAE 

 Aerobacter aerogenes (Kruse) Beijerinck 



Synonymy. — Bacillus lactis aerogenes. 



Habitat. — Grains, plants, intestinal tract of man and other animals. 



Natural vectors. — Blaberus craniifer, U.S.A. (Wedberg et al., 

 1949) : Isolated from feces. 



Blatta orientalis, Poland (Nicewicz et al., 1946) : Isolated from 

 intestinal tract. 



Blattella germanica, on shipboard (Morrell, 191 1) : Isolated from 

 feces, 



Periplaneta americana, U.S.A, (Bitter and Williams, 1949) : Iso- 

 lated from intestinal tract. 



