Toxoplasmosis is a kind of zoonosis caused by Toxoplasma gondii, which is worldwide distributed and seriously endangers human health. Toxoplasma gondii can infect all kinds of livestock and wild animals, but it is most susceptible to young animals. The main route of infection is through oral. When the sporatedoocyst of Toxoplasma gondii is swallowed by a healthy dog or cat, it will escape from the intestinal tract and enter the organism tissue with blood circulation, then invade and proliferate rapidly in the cells, and turn into a intracellular pseudocyst, causing clinical symptoms.