How do cats infect people with worms? - briefly
Cats can transmit worms to humans through direct contact with contaminated feces, soil, or fur, or by ingesting undercooked meat or water containing worm eggs or larvae.
How do cats infect people with worms? - in detail
Cats can transmit parasitic worms to humans through various pathways, primarily due to the presence of worm eggs or larvae in their feces, fur, or environment. One of the most common parasites involved is Toxocara cati, a roundworm that infects cats and sheds its eggs in their feces. When a cat defecates outdoors or in a litter box, these eggs can contaminate soil, sand, or surfaces. Humans, especially children, may accidentally ingest these eggs if they touch contaminated areas and then put their hands in their mouths. Another parasite, Ancylostoma braziliense, a type of hookworm, can penetrate human skin directly, often when walking barefoot on soil or sand contaminated with cat feces containing larvae. Tapeworms, such as Dipylidium caninum, can also be transmitted to humans if they accidentally ingest fleas that have fed on an infected cat. This can occur during close contact with pets, particularly if hygiene practices are insufficient. Additionally, Toxoplasma gondii, a protozoan parasite, can be transmitted through contact with cat feces, though it is not a worm, it poses similar risks. Proper hygiene, such as washing hands thoroughly after handling cats or cleaning litter boxes, and ensuring pets are regularly dewormed, significantly reduces the risk of transmission. Avoiding direct contact with potentially contaminated soil or sand and preventing fleas on cats are also essential preventive measures.