Fleas and Toxoplasma gondii outside the body of the Teddy dog ​​can infect people. If there are fleas and Toxoplasma gondii hidden in the hair of the Teddy dog, the Teddy dog ​​must be isolated first to help deworm the dog internally and externally to avoid infection. The parasites in Teddy's body cannot be transmitted to humans. If there are parasites in the intestines of Teddy dogs at home, the owner only needs to deworm the dog internally and externally.