Cockroaches are not clean because they like to live in warm and humid places with plenty of food and gaps. They are omnivorous insects. They crawl everywhere from the kitchen to the garbage dump, eat everything, pollute and swallow many pathogens, and become mechanical communicators of many pathogens. Cockroaches can carry a variety of bacteria, viruses and eggs harmful to human health, and the harm can not be ignored.

Cockroaches also live in groups. It is often found that in a habitat, there are always as few as a few, and as many as dozens or hundreds of them gather together, mainly because of the lure of pheromones. Both adults and larvae of cockroaches secrete an aggregation pheromone. In the place where cockroaches live, brown spots formed by their feces can often be seen. The more feces, the more cockroaches gather.

Extended data:

harm

Cockroaches can be artificially infected with bacteria that cause cholera, pneumonia, diphtheria, gangrene, anthrax and tuberculosis in Asia. Cockroaches can carry many kinds of eggs, such as roundworms, hookworms, beef tapeworms, roundworms and whipworms. They can also be used as intermediate hosts for Echinococcus moniliforme, Hymenolepis brevis, tumor ducts and other nematodes.

Cockroaches can also carry many kinds of protozoa, among which four kinds of protozoa are pathogenic to humans or animals, such as amebic dysentery and Giardia. Experimental studies have confirmed that cockroaches can carry, preserve and excrete viruses, including Coxsackie virus and poliovirus. Cockroaches can also carry fungi. A variety of fungi, including a large number of Aspergillus flavus, were isolated from cockroaches captured indoors in Nanjing and Nantong, Jiangsu Province.

Although cockroaches carry a variety of pathogens, it is generally believed that pathogens cannot reproduce in their bodies and belong to mechanical transmission media. However, due to their wide invasion range and miscellaneous eating habits, they can not only move in garbage, toilets, bathrooms and other places, but also feed on food, thus causing intestinal diseases, and the spread of parasitic eggs can not be ignored.

In addition, cases of allergic reactions caused by cockroach body fluids and feces have also been reported. Moreover, the products of factories, goods in shops and food at home may all cause economic losses due to cockroach bites and stains. Occasionally, there will be communication equipment and computer failures caused by cockroaches, which will lead to accidents. Some people abroad call cockroaches "computer pests".