Entamoeba sp.
Natural vector.—Periplaneta americana, Gold Coast Colony (Macfie, 1922): Under the heading "Entamoeba histolytica and E. coli" Macfie (p. [445]) stated, "The cockroaches used in these experiments had previously been carefully examined for amoebic infections a precaution which was doubly necessary, because some of these insects at Accra had been found naturally infected."
Experimental vectors.—Periplaneta americana, Gold Coast Colony (Macfie, 1922): Entamoeba, resembling E. coli, from feces of the monkey [Erythrocebus patas patas (Schreber)] were fed to cockroaches, and on the second to fourth days thereafter apparently healthy cysts were recovered in the cockroach feces.