North American Veterinary Licensing Examination (NAVLE) Practice Test

What organism might be responsible for diarrhea in a kitten if Giardia tests are negative and elongated motile organisms are observed?

1. Paragonimus kellicotti, Praziquantel

2. Tritrichomonas foetus, Ronidazole

3. Taenia taeniaformis, Praziquantel

4. Cryptosporidium, Clindamycin

The correct answer is: Tritrichomonas foetus, Ronidazole

Tritrichomonas foetus is a significant protozoan parasite that can cause diarrhea in cats, including kittens, especially in cases where Giardia tests have returned negative results. This organism is known for its elongated, motile appearance, which corresponds to the observed characteristics in the question. Infections caused by Tritrichomonas foetus are often associated with large bowel diarrhea. Symptoms may include intermittent diarrhea, which can be watery and may also contain mucus. It is crucial to consider this organism if other common causes like Giardia are ruled out, as its presence can lead to similar clinical signs. Treatment with Ronidazole is considered effective against Tritrichomonas foetus. It's important to note that while other options mention various organisms and treatments, they do not align with the clinical presentation of diarrhea in kittens as effectively as Tritrichomonas foetus does, particularly in the context of negative Giardia tests.