Cockroaches are notorious disease carriers and are linked to allergy and asthma issues. The most common household insect, the German cockroach, grows to about 5/8″ long and is usually brown. Adult males are typically narrower than females. These pests are known to infest areas of the home such as kitchens and bathrooms. Any area that provides food and water are sufficient for the cockroach, although they tend to prefer a warmer environment. Since cockroaches will feed on human food, they can spread disease through contamination.
Cockroaches leave chemical trails in their feces and emit airborne pheromones used for swarming and mating, which transmits bacteria on surfaces. Other cockroaches will track these trails to seek sources of food and water, and discover where other cockroaches are hiding.