Tritrichomonas foetus (T. foetus) is a protozoan parasite that has increasingly attracted attention in feline medicine and has been identified as an important cause of chronic large-bowel diarrhoea in cats, especially among young pedigree cats in multi-cat settings. T. foetus was first associated with diarrhoea in cats in the USA, but has since been reported in the UK, Greece, Italy, Norway, Switzerland, the Netherlands, Australia and New Zealand. Although many recent reports of this parasite in cats may give the impression that feline tritrichomoniasis is an emerging disease, it is suggested that the current frequent diagnosis of T. foetus in cats might be due to a rise in the awareness about the parasite among veterinarians and improved diagnostic methods, rather than an actual increase in the incidence of the disease.6 However, in a recent Australian study,1 the authors suggest that feline tritrichomoniasis may be an emerging contagious infectious disease of Australian cats, since breeders are known to import desirable studs and queens from overseas, and these cats are subsequently moved from cattery to cattery, and presented at shows.