The oriental cockroach is found in the cooler areas of Australia. They are dark brown or black and may be found under floors, in sewers and drains, and around garden rubbish.
A single female oriental cockroach has a much lower potential for producing offspring than either the German or the brown-banded females. They are more sensitive to lack of water than other cockroaches and like cool, damp locations. Look for oriental cockroaches in dark, damp basements, crawl spaces, areas between soil and the foundation, underneath sidewalks, in sewer pipes, floor drains and any other cool, moist place. Outside, they sometimes aggregate near or under garbage cans. Economic and health impacts of cockroaches.
Cockroaches are a health hazard. They carry bacteria on their bodies from sewers, drains and garbage areas and then transmit it to you and your family by visiting your kitchen and bathroom areas. Feeding in such areas as sewers, drains and garbage areas brings them in contact with disease organisms including salmonella and other organisms associated with dysentery, typhoid, hepatitis and tuberculosis.
Ingested bacteria can survive in the cockroach's digestive system, sometimes for months or even years, and are passed in its droppings. It is thought that disease is then transmitted to humans when they eat cockroach droppings on contaminated food.