Roaches can foul food, damage wallpaper and books, eat glue from furniture, and produce an unpleasant odor. Some homeowners are allergic to roaches, and the pests can contaminate food with certain bacterial diseases that result in food poisoning, dysentery, or diarrhea. They spread bacteria that cause food poisoning, such as Salmonella and Shigella. They also might carry coliform bacteria, Streptococcus and Staphylococcus.
This species produce additional eggs after mating and mature at a quick rate. Therefore, a large infestation is more likely, and this will increase the possibility of asthma complications and allergies. German cockroaches' feces and saliva contain problematic proteins and allergens, which may trigger asthma attacks. In densely populated cities, scientists have identified a correlation between roach presence and the incidence of asthma. Cockroach allergens cause lots of allergic reactions, especially in children. These allergens build up in deposits of droppings, secretions, cast skins, and dead bodies of roaches. This makes German cockroach control vital.
If the population increases to a large number, the cockroaches will quickly need to find new food sources; this can include food residue on human skin or mucus excretions around the eyes, nose and mouth. The German cockroaches can chew and will gladly chomp down with a painful bite which may cause mild skin irritation. If you find cockroach feces in your house, vacuuming and cleaning affected areas with warm water and soap can help lessen allergic reactions.