There are 6 species of cockroaches that are considered pests, and can cause health problems in humans. They are a pest that are largely dreaded due to their potential to transmit diseases and cause allergic reactions. They can contaminate food areas with regurgitations, excreta, egg cases and moulted skins. Cockroach allergens can cause asthma attacks so it is extra important for anyone allergic to cockroaches to use baits instead of sprays which can further irritate allergies and asthma.*