Because they are drawn to human food, cockroaches are a cause of food contamination. Cockroaches both defecate and regurgitate on the food that they eat. While this is disgusting on its own, it also spreads bacteria and parasites that may be living inside of them. Some of the dangers of cockroaches in this regard include bacterial infections. A bacteria called Pseudomonas aeruginosa is particularly found in cockroaches and can be transmitted to humans. The Salmonella bacteria can also be spread by cockroaches, where it can cause diseases ranging from food poisoning to typhoid.
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