NO. 10 COCKROACHES—ROTH AND WILLIS 55 
Experimental vectors ——Blatta orientalis, Italy (Cao, 1898, 1906) : 
The organism passed unchanged through the gut of this cockroach 
and was excreted in the feces. In some experiments, attenuated cul- 
tures of this organism regained their full virulence on passage through 
the cockroach (Cao, 1906). 
Family MICROCOCCACEAE 
Micrococcus aurantiacus (Schroeter) Cohn 
Source—Usually isolated from infections; may be pathogenic; 
found in milk, cheese, and dust. 
Natural vectors ——Blattella germanica, U.S.A., Connecticut (Jans- 
sen and Wedberg, 1952): Organism isolated from feces and ali- 
mentary canal. 
Micrococcus citreus Migula 
Synonymy.—Staphylococcus citreus. 
Disease —Pathogenic; isolated from pus; found on skin and 
mucous membranes of vertebrates (Breed et al., 1948). Nonpatho- 
genic (Wilson and Miles, 1955). 
Natural vectors——Cockroaches, U.S.A. (Longfellow, 1913): Or- 
ganism isolated from legs and feces. 
Experimental vectors ——Blatta orientalis, Italy (Cao, 1898): Or- 
ganism not recovered in the feces. 
Micrococcus epidermidis (Winslow and Winslow) Hucker 
Disease.—Parasitic rather than pathogenic; found on skin and 
mucous membranes. 
Natural vectors.—Blattella germanica, U.S.A., Connecticut (Jans- 
sen and Wedberg, 1952): Organism isolated from feces and ali- 
mentary canal. 
Micrococcus pyogenes var. albus (Rosenbach) Schroeter 
Synonymy.—Staphylococcus albus. 
Disease —Occurs in wounds, boils, abscesses. Pathogenic. Habi- 
tat: Skin and mucous membranes. 
Natural vectors—Blaberus craniifer, U.S.A., Connecticut (Wed- 
berg et al., 1949): Organism isolated from feces. 
Blatta orientalis, U.S.A., lowa, (Tauber, 1940; Tauber and Griffiths, 
1942): Organism isolated from hemolymph. 
Blattella germanica, U.S.A. (Herms and Nelson, 1913; Herms, 
