Cockroaches have been around for a whopping 400 million years. During that time, they have become perhaps the most popular of household pests. While roach infestations are a nasty nuisance, the also carry several disease pathogens that are linked to food-poisoning, staph, strep, E-coli and others. Roaches often occur in groups, and will eat anything that provides nutritional value. To prevent roaches from coming into your property, check incoming items for roaches and maintain a clean environment.