Cockroach Treatment & Pest Control in Penrith Cockroaches may spread a range of bacteria including Salmonella, Staphylococcus and Streptococcus and they have also been known to harbor the polio virus. Recent research suggests that Cockroaches may also be associated with human allergies. Cockroaches vomit and defecate on food and this has the ability to contaminate … Continue reading Cockroaches