What is a known source of Toxoplasma oocysts for humans?

The correct response identifies litter boxes as a known source of Toxoplasma oocysts for humans. Toxoplasma gondii, the parasite that produces these oocysts, is commonly found in cat feces. When cats shed these oocysts, they can accumulate in litter boxes, creating a pathway for human infection, particularly when proper hygiene practices are not followed.

Handling litter without adequate protection, such as gloves, or failing to wash hands thoroughly after handling cat litter can lead to transmission. This scenario emphasizes the importance of safe handling practices for cat owners, particularly pregnant women and immunocompromised individuals, to avoid the risk of Toxoplasmosis.

While children's sandboxes, contaminated water sources, and public swimming pools can pose health risks, they are not as direct or common a source of Toxoplasma oocysts. The typical transmission route is much more aligned with litter in the context of this particular parasite.