Blattella germanica or Periplaneta americana, Egypt (DeCoursey and Otto, 1956, 1957): One out of 44 cockroaches collected in a village harbored E. coli.
Experimental vector.—Periplaneta americana, Gold Coast Colony (Macfie, 1922): In nine experiments cysts of E. coli were fed to the cockroaches. In seven of the experiments cysts of E. coli were found in the feces. Cysts were observed in the feces for only one to three days, and eventually disappeared completely. The cysts appeared to be unharmed. No amoebae were found.
* Entamoeba histolytica Schaudinn
Natural vectors.—Blatta orientalis, Blattella germanica, Periplaneta americana, Periplaneta australasiae, and/or Supella supellectilium, Peru (Schneider and Shields, 1947).
Blattella germanica and/or Periplaneta americana, Egypt (DeCoursey and Otto, 1956, 1957).
Cockroaches, Venezuela (Tejera, 1926).
Experimental vectors.—Blatta orientalis, Italian Somaliland (Mariani and Besta, 1936).
Periplaneta americana, Gold Coast Colony (Macfie, 1922); U.S.A. (Frye and Meleney, 1936).
Cockroaches, Venezuela (Tejera, 1926).