APPENDIX: Do PROVOZOX 
PATHOGENIC PROTOZOA ASSOCIATED WITH 
COCKROACHES 
Information on the diseases caused by protozoa was taken from 
Chandler (1949) and Faust (1955). The classification follows Kudo 
(1954). 
Phylum PROTOZOA 
Class MASTIGOPHORA 
Order PROTOMONADINA 
Family TRYPANOSOMATIDAE 
Herpetomonas periplanetae Laveran and Franchini 
Disease.—Possibly pathogenic to white mice. 
Natural vectors.—Blatta orientalis, Italy (Laveran and Franchini, 
1920): The contents of the digestive tract of B. orientalis, containing 
Hi, periplanetae, were injected into eight white mice; five mice died. 
The pathogenicity of this organism is questionable, inasmuch as the 
entire intestinal contents were injected rather than a pure culture of 
the protozoan. 
Order POLYMASTIGINA 
Family TRICHOMONADIDAE 
Trichomonas hominis (Davaine) 
Disease—The pathogenicity of T. hominis has not been proved, 
but it is often associated with persistent diarrhea, for which it may 
or may not be responsible. 
Experimental vectors——Blatta orientalis, South Africa (Porter, 
1918) : The cockroaches ingested this organism by feeding on infected 
human feces. T. hominis passed unchanged through the insects’ in- 
testines and was successfully transferred to rats. Italian Somaliland 
(Mariani and Besta, 1936): Human Trichomonas, presumably T. 
hominis, and Chilomastix were fed to cockroaches on bread. The 
flagellates were present in 60 percent of the cockroaches examined 
in the first 48 hours, in 25 percent of the insects after 10 days, and in 
IO percent after 20 days. In a second experiment these flagellates 
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