Prevalence of Tritrichomonas foetus Among Cats in Poland Between 2020 and 2024

<i>Tritrichomonas foetus</i> is a parasitic protozoan that causes large-bowel disorders in domestic cats worldwide. Between 2020 and 2024, 1606 feline stool samples were tested for <i>T. foetus</i>. The aim of this study was to determine the prevalence of <i>T. foetus</i> infection among cats with diarrhea reported within the last 6 months, and to assess age and sex as risk factors for <i>T. foetus</i> infection. The diagnostic method of choice was nested PCR with modifications to reduce potential reaction inhibition. Overall, <i>T. foetus</i> DNA was detected in 10.6% (170/1606) of cats, with the highest prevalence observed in animals younger than one year, 14.9% (106/711). This study confirms that <i>T. foetus</i> infection is common in domestic cats in Poland. Therefore, this parasite should be included in the differential diagnosis protocol for feline patients with large-bowel diarrhea.