Cockroaches, Paraguay? (Elmassian, 1909); Austria (Bělǎr, 1916); U.S.A. (Morris, 1935, 1936; Balch, 1932); Venezuela (Tejera, 1926).
The habitat of E. blattae (fig. 2, C) is the hind intestine and rectum of the cockroach. The incidence of infection varies: Kudo (1925a) found in 1,255 oriental cockroaches infections in 5 percent in March and 50 percent in the summer; Schubotz (1905) found 5 to 20 percent of the examined cockroaches to be infested; Yakimov and Miller (1922) found 4 percent of 124 oriental cockroaches infested; Zasukhin (1930) found up to 50 percent of over 3,000 B. orientalis infested; Meglitsch (1938, 1940) found almost 100 percent infection in B. orientalis kept in a crowded culture for several weeks. Chen (1933) developed two synthetic media in which E. blattae could be grown for 45 to 50 days.
Mercier (1907a) observed a fungus, Nucleophaga sp., hyperparasitic in the nucleus of Endamoeba blattae.
Endamoeba javanica Kidder
Natural hosts.—Panesthia angustipennis, Philippine Islands, and Panesthia spadica, Japan (Kidder, 1937): Occurred in 50 percent of P. angustipennis examined and in one of four P. spadica. The endoplasm of this amoeba contains large amounts of wood and cellulose fibers.
Endamoeba philippinensis Kidder
Natural host.—Panesthia angustipennis, Philippine Islands (Kidder, 1937): Occurred in about 10 percent of the Panesthia examined. The food vacuoles contained bacteria, no wood.
Entamoeba coli (Grassi)
Synonymy.—Endamoeba coli, Amoeba coli [Kirby, 1945].
Natural vectors.—Blaberus atropos, Venezuela (Tejera, 1926): In a lot of 60 cockroaches captured in latrines, two were found that carried apparently live cysts similar to cysts of E. coli.