Do cockroaches really carry as much disease as they're reputed to?

Do Cockroaches Transmit Disease to Humans?
Although cockroaches have the potential to spread bacteria and parasites, most species are not major disease vectors. There are a few exceptions:

Salmonella - Roaches can carry this bacteria on their body and contaminate food that isn't properly stored or prepared. Salmonella food poisoning causes diarrhea, fever, and stomach cramps.
Dysentery - Cockroaches can transmit dysentery-causing amoeba cysts in their feces if they contaminate food and water.
Gastroenteritis - Roaches can spread the viruses, bacteria, or parasites that cause gastroenteritis through contact with food.
Typhoid fever - Roaches are not direct carriers, but can transmit typhoid between infected and non-infected humans if they walk over contaminated surfaces.
Polio - Cockroaches can pick up polio virus on their legs and antennae and transport it to food sources.
Cholera - Although not common, cockroaches may be able to transmit cholera bacteria in unsanitary conditions.
Despite these risks, most cockroach-human disease transmission requires the roaches to actually walk over contaminated surfaces or food. Their role is more as passive transporters, not hosts or reservoirs of disease.