Toxoplasma gondii, shed by cats, causes disease in immunocompromised people and developing fetuses. Understanding transmission protects both human and cat welfare.
Toxoplasmosis and cat welfare intersect primarily through the welfare harm caused by exaggerated public fear of the parasite. Misconceptions about Toxoplasma risk from cats lead to unnecessary cat abandonment by pregnant women — often advised by healthcare providers without nuanced understanding of the actual transmission routes. The welfare cost to abandoned cats is significant and largely unjustified: indoor cats that do not hunt pose minimal Toxoplasma risk, and even outdoor cats are infectious for only a brief period. Simple precautions including having someone else clean the litter box, or wearing gloves when cleaning, eliminate the practical risk while allowing cats to remain in their homes. Public health messaging that accurately represents transmission routes protects both human health and cat welfare.