Roaches are capable of transmitting a variety of diseases, but are most often implicated in the transmission of Salmonella, the causal agent of some food poisoning. Cockroaches also cause respiratory problems to individuals sensitive to the allergens they produce.
There are many different species of cockroaches in America, probably about half are native and rarely encountered in the urban environment. Those established in urban areas include: American, Brownbanded, Field, German, Oriental, Surinam and Turkestan. Most cockroaches are tropical or sub-tropical in origin and generally live outdoors. However, some species have adapted well to living
indoors with humans.
Though it is true that they prosper in clutter, filth and grime, cockroaches at times infest even the most sanitary and well-organized homes and buildings. Cockroaches are often carried into homes in infested foodstuff, particularly dried pet foods, cardboard boxes and in seasoned firewood. They also enter around loose-fitting doors and windows, where electrical lines or water and steam pipes pass through walls, and through sewer lines. Cockroaches will feed on any unprotected kitchen goods contaminating food with excrement and salivary secretions.
They also eat materials such as leather, wallpaper
paste and bookbinding.
Most cockroaches are nocturnal and appear during daylight only when disturbed or where there is a heavy infestation. They prefer warm, dark, humid shelters, and often move around the kitchen sink or drain board. They prefer to rest in cracks around, under or inside cupboards and cabinets; where pipes or electrical wiring pass along or through a wall; behind window or door frames, loose baseboards or molding strips; under tables and chairs; in upholstered furniture; in bathrooms; in radio and TV cabinets; and in motor compartments of refrigerators, washing machines and other appliances. It is important to know where cockroaches are hiding in your home because these are the locations that must be cleaned.