Previously thought to be a native of Europe, the German cockroach later was considered to have emerged from the region of Ethiopia in Northeast Africa, but more recent evidence suggests that it actually originated in Southeast Asia.
22.
Most common roaches in this country are the German cockroach, which is small ( 1 / 2 inch ) and repulsive, and the Amrican roach, which is large ( up to 1 3 / 4 inches ) and repulsive.
23.
"P . aeruginosa " is commonly found in the exoskeletons and droppings of the domestic cockroaches including the American cockroach and the German cockroach which are found to be pervasive in households, as well as in hospital settings.
