One page, in plain language, so that nobody can be misled by a summary they read quickly. If you read nothing else here, read the first two sections.
This site does not diagnose your cat, does not prescribe for your cat, and does not tell you what dose to give. It summarizes published research so that you can have a better conversation with a veterinarian who can examine your animal, weigh it, take its history and prescribe lawfully.
Reading this site does not create a veterinarian–client–patient relationship with anybody. No one here has examined your cat. A page cannot weigh a cat, feel its abdomen, or know what medication it is already taking. Those things determine the answer.
Ronidazole is the only treatment demonstrated to eliminate this infection, and it is not approved for use in cats — or in any companion animal — and has been banned in food animals over concerns about human health effects. It has a narrow safety margin and can cause neurological signs including tremors, ataxia, agitation and seizures. It is also a suspected human reproductive and carcinogenic hazard, which matters to anyone handling a compounded powder.
Where the site explains a dose or a schedule, it is explaining why a protocol looks the way it does, and why an older version is still circulating. It is not handing you something to administer. Off-label prescribing is a decision for a licensed veterinarian with your informed consent.
Case reports submitted by owners and fosterers are self-reported, unverified and self-selected. People whose treatment failed are more likely to complete the form than people whose cat recovered, which biases every published figure towards failure. The results page therefore describes the people who answered, not the population of infected cats, and never states a clearance or failure rate.
Nothing on this site can tell you whether ronidazole works. That requires a prospective trial with a control and a denominator.
Claims carry a grade: Clinical trial, Laboratory only, No published evidence, or Harm reported. Unpublished observation is marked field experience or anecdotal. Anecdote is evidence that someone reports an outcome; it is never evidence that the thing caused it.
The organism is referred to here as Tritrichomonas foetus and Tritrichomonas blagburni. The second name was proposed in 2013 for the feline organism and is not universally adopted. Both names describe the same thing, and this site uses both so that whichever one appears on your laboratory report or your veterinarian's notes, you are in the right place.
Every clinical page states that the medical reviewer of record is pending, because no veterinarian has yet reviewed this site. That word is not decorative and will remain until it is inaccurate. Treat the content accordingly: it is a careful summary of primary literature by a non-veterinarian, not a reviewed clinical resource.
This project may share practical products used in rescue work, and some links may be affiliate links carrying a small commission, disclosed at the point of the link and governed by the editorial & content policy. Financial incentives never influence what is recommended, and nothing is presented as a medical necessity because it could earn a commission.
Links to other sites are provided for reference. Their content, accuracy and privacy practices are their own, and a link is not an endorsement.
This site will contain mistakes. When one is found it is corrected and recorded, with a date, in the corrections log. The log begins at publication, and nothing that a reader relied on is changed without an entry. If you find one, please write to info@tritrichomonasproject.org. Being corrected is the point.
