Cockroaches are the most likely to cause intestinal diseases.

Cockroaches are most likely to cause intestinal diseases. Cockroaches, which are ranked as the first of the "four pests", generally like to survive in humid places. They carry more than 40 kinds of pathogenic bacteria such as plague bacillus, E. coli, and dysentery bacillus, and bacteria that can transmit carcinogens on their bodies. Moreover, they also carry various parasites externally, such as roundworms, hookworms, nematodes, and whipworms, which pose great harm to human health.

If people drink "cockroach water" that hasn't been boiled, it may cause symptoms such as diarrhea, gastroenteritis, and fever. If cockroaches have been contaminated with rat poison or anti-termite medicine before crawling into the water pool, and then bring these toxins into the water pool, the water will also contain certain toxins. Even boiling this water makes it difficult to eliminate toxic substances. Experts remind that a denser sanitary protective mosquito net should be used at the overflow pipe, drain pipe, and vent of the pool to prevent pests such as rats and cockroaches from entering.