Final answer:
Toxocara cati is not known to infect humans through skin penetration; this mode of infection is associated with hookworms such as Ancylostoma braziliense causing cutaneous larva migrans. Toxocara is typically ingested, while Toxoplasma gondii, from toxoplasmosis, also doesn't enter through the skin but rather through ingestion of oocysts or undercooked meat.
Step-by-step explanation:
Toxocara cati, while a known parasite in cats, does not typically infect humans through skin penetration. Instead, similar parasites, such as hookworms like Ancylostoma braziliense, are notorious for this mode of transmission, causing a condition called cutaneous larva migrans, where they can migrate in the subcutaneous tissue and cause itchy tracks on the skin. However, the primary concern with Toxocara infections in humans arises from accidental ingestion of the parasite's eggs through contaminated soils or cat feces, which can lead to various health issues, especially in immunocompromised individuals.
When considering Toxoplasma gondii, the causative agent of toxoplasmosis, its mode of transmission to humans is mainly through the ingestion of oocysts from contaminated sources or undercooked meat. Unlike Toxocara, it does not enter through the skin. Toxoplasmosis is known for its potential to cause serious complications in certain groups such as pregnant women and immunocompromised patients, leading to issues like neurotoxoplasmosis, particularly when the latent parasite becomes active again.
Overall, while many parasites can enter the human body via the skin or other routes, it is crucial to distinguish between the different parasites and their specific modes of transmission when discussing potential human infections.