60 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 134 
lation in agonal stages of diseases. Habitat: Intestine of man and 
other vertebrates. 
Natural vectors.—Blatta orientalis, Italy (Cao, 1898, 1906). France 
(Sartory and Clerc, 1908). Italy (Spinelli and Reitano, 1932). 
Europe (Jettmar, 1935). Poland (Nicewicz et al., 1946). 
Blattella germanica, U.S.A. (Steinhaus, 1941). 
Periplaneta americana, U.S.A., Texas (Bitter and Williams, 1949, 
19492). 
Cockroach, U.S.A. (Longfellow, 1913). 
Cockroaches (presumably B. orientalis, B. germanica, and/or P. 
americana), Egypt (El-Kholy and Gohar, 1945). 
Organism isolated from feces of B. orientalis, from intestinal con- 
tents of all hosts, and from outer surfaces of bodies or suspensions 
of whole, undetermined cockroaches. 
Experimental vectors —Blattella germanica, Germany ( Vollbrechts- 
hausen, 1953) ; Organisms injected into the insects’ intestinal tracts 
in a serum and salt solution. Highest concentrations of bacteria killed 
the insects, but most insects survived the lowest concentration. The 
test organism was recovered from the feces during the first 14 days. 
Klebsiella pneumoniae (Schroeter) Trevisan 
Synonymy.—‘‘Bacillo di Friedlander” of Cao. 
Disease.—Pneumonia. Associated with infections of respiratory, 
intestinal, and genitourinary tracts of man. Has been isolated from 
soil, water, and milk. 
Experimental vectors—Blatta orientalis, Italy (Cao, 1898): This 
organism passed through the insects’ guts unchanged in virulence. 
Paracolobactrum aerogenoides Borman, Stuart and Wheeler 
Source—Human gastroenteritis. Habitat: Surface water, soils, 
intestine of man and other animals. 
Natural vectors.—Blattella germanica, U.S.A. (Janssen and Wed- 
berg, 1952): Organism isolated from feces and alimentary canal. 
Periplaneta americana, U.S.A. (Bitter and Williams, 1949): Or- 
ganism isolated from intestinal tract. Doubtful pathogenicity. 
Paracolobactrum coliforme Borman, Stuart and Wheeler 
Source-—Human gastroenteritis. Habitat: Soils, surface water, 
intestinal tract of man and other animals. 
Natural vectors.—Blattella germanica, U.S.A. (Janssen and Wed- 
