Blood-sucking worms found in tap water in Shanghai

This kind of worm should be commonly known as the red worm, that is, the water earthworm, rather than the Schistosoma japonicum with a length of only10-20 mm. The red worm is not a parasite, and although it will not cause direct harm to the human body, its own bacteria and its excrement will cause gastrointestinal discomfort, leading to symptoms such as diarrhea, nausea and vomiting. At the same time, as the "indicator organism" of unclean water, its existence shows that a certain link of tap water has been polluted by organic pollution during transportation.

The pressure in the tap water pipeline is so high that it is difficult for insects to breed in the pipeline. Most of them are the problems of "secondary pressurization", that is, the water tower or roof water tank does not clean the breeding insects for a long time.

It is recommended to ask about the property with neighbors.