Cockroaches carry diseases such as salmonella, dysentery, gastroenteritis and other stomach complaint organisms.
As cockroaches must moult regularly throughout their lifecycle, the discarded skin can become airborne and can cause severe asthmatic reactions, particularly in children and the elderly.
Cockroaches will eat almost any organic matter no matter how rancid, they even eat each others faeces.
Cockroaches rest during daylight hours in areas such as wall cavities, roof spaces, crack and crevices and subfloor areas. Emerging at night time, they feed and mate in kitchen areas and bathrooms. If you see cockroaches during the day in your home you have a serious problem.