APPENDIX B: BACTERIA 
Most of the bacteria listed below are pathogenic to humans, but 
some are primarily of veterinary importance. Species that are nor- 
mally nonpathogenic but which apparently acquired pathogenicity (to 
laboratory animals) on passage through the cockroach have also been 
included. 
Where it has been possible to synonymize the names of the bacteria, 
as used in the references cited, we have followed Bergey’s Manual of 
Determinative Bacteriology, sixth edition (Breed et al., 1948). The 
disease entity and habitat of each organism were obtained from Breed 
et al. (1948), Smith et al. (1948), and Dubos (1948), or other indi- 
cated sources. The taxonomic arrangement follows that of Breed 
et al. (1948). 
Part I contains positive associations of cockroaches with valid 
species of bacteria. Part II contains positive associations of cock- 
roaches with pathogenic bacteria whose taxonomic position is uncer- 
tain. Part III contains negative findings. 
PART I. PATHOGENIC® BACTERIA ASSOCIATED WITH 
COCKROACHES 
Phylum SCHIZOPHYTA 
Class SCHIZOMYCETES 
Order EUBACTERIALES 
Family PPEUDOMONADACEAE 
Pseudomonas aeruginosa (Schroeter) Migula 
Synonymy.—Bacillus pyocyaneus. 
Common name.—Blue pus organism. 
Disease.—Cause of various lesions in humans and other animals, 
urinary tract infections. Habitat: Polluted water, sewage. 
Natural vectors-—Blaberus craniifer, U.S.A. (Wedberg et al., 
1949): Organism isolated from feces. 
Blatta orientalis, U.S.A. (Olson and Rueger, 1950; T. A. Olson, 
p.c.): From laboratory-reared cockroaches. 
Blattella germanica, U.S.A. (Janssen and Wedberg, 1952) : Organ- 
8 Certain of these bacteria are considered to be nonpathogenic or of doubtful 
or low pathogenicity by some authors. 
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