Companion Animals

Feline Tritrichomonas: Welfare and Management

Tritrichomonas foetus causes chronic large bowel diarrhoea in cats, particularly in pedigree breeds and multi-cat households, with significant welfare and quality of life impacts.

Key Facts

Tritrichomonas foetus infection is most common in young pedigree cats housed in groups
The organism causes persistent large bowel diarrhoea often refractory to conventional treatments
Prevalence in cat show populations has been estimated at 10-30% in some studies
Ronidazole is the most effective treatment but is not licensed for cats in many countries

Welfare Considerations

Chronic diarrhoea causes significant welfare impacts including pain from colitis, perineal irritation, soiling and reduced quality of life. Affected cats often suffer social stigma in multi-cat households due to faecal odour. Long-term welfare management requires accurate diagnosis by PCR, treatment with ronidazole under veterinary supervision, and hygiene measures to prevent reinfection.

What You Can Do

Request PCR testing rather than simple smear if a cat has persistent large bowel diarrhoea
Isolate affected cats to prevent spread in multi-cat households
Discuss ronidazole treatment with a vet experienced in feline gastroenterology
Disinfect litter trays daily with appropriate disinfectants to reduce environmental contamination