The answer to 'are cockroaches dangerous' is that cockroaches are generally not considered dangerous to humans. While they can carry and spread some diseases, they are not known to directly harm people. However, cockroaches can be a serious nuisance and health concern in homes due to their ability to contaminate food and spread bacteria.
Cockroaches are opportunistic pests that thrive in unsanitary conditions. They can pick up and spread bacteria like salmonella, dysentery, and gastroenteritis. Their droppings and shed skins can also trigger allergic reactions and asthma attacks in some people. So while cockroaches themselves don't directly harm humans, their presence in the home can lead to health problems.