The brown-banded cockroaches feed on food debris and scraps. They are scavenger feeders. They also can eat wallpaper paste, paper goods, and book bindings. These cockroaches will even eat other insects, feces, and pet food.
The brown-banded cockroach does create health risks. They can get on food and contaminate with their feces and bacteria, this can cause a case of food poisoning.
Cockroaches do spread bacteria, protozoans, and viruses. Different forms of gastroenteritis appear to be the primary illness caused by cockroaches. Cockroach droppings and cast skins also contain a number of allergens which some people are allergic to; some physical reaction include skin rashes, watery eyes,sneezing, congestion, and asthma.