Toxoplasmosis in Cats and Welfare Management

Toxoplasma gondii infection can cause serious disease in immunocompromised cats, and management of infected cats involves welfare-significant decisions about treatment and environmental control.

Key Facts

Cats are the definitive host for Toxoplasma gondii and shed oocysts in faeces for 1-3 weeks after primary infection
Most healthy adult cats show no clinical signs from toxoplasma infection
Immunocompromised cats including those with FIV or FeLV can develop severe systemic disease
Clinical disease causes fever, respiratory signs, neurological dysfunction, and ocular inflammation
Clindamycin is the primary treatment, significantly improving welfare outcomes in affected cats

Welfare Considerations

Toxoplasmosis in immunocompromised cats causes multi-system disease that progresses rapidly without treatment. Neurological toxoplasmosis causing seizures and progressive dysfunction is profoundly distressing for both cat and owner. Ocular toxoplasmosis causes pain and vision loss. The welfare complexity of toxoplasmosis management includes the public health dimension of oocyst shedding, which may influence owner decisions about outdoor access that have wider welfare implications for the cat. Evidence-based risk communication is essential for welfare-optimal management.

What You Can Do

Seek veterinary assessment for cats showing neurological or respiratory signs with unknown history
Discuss toxoplasmosis testing with your vet if your cat has immune suppression from FIV or FeLV
Use litter trays and change litter daily to reduce oocyst sporulation and environmental contamination
Wash hands after handling cat litter, particularly if immunocompromised or pregnant
Advocate for evidence-based public health guidance that does not unnecessarily penalise cat welfare