Which organism is characterized by an uninuclear trophozoite?

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Study for the Clinical Laboratory Science Parasitology Test with flashcards and multiple choice questions. Each question comes with hints and explanations to ensure you're exam-ready. Improve your understanding of parasitology and succeed with confidence!

Multiple Choice

Which organism is characterized by an uninuclear trophozoite?

Explanation:
Understanding how many nuclei a trophozoite has helps distinguish these parasites under the microscope. Chilomastix mesnili has a trophozoite with a single nucleus, which is a defining feature of this organism. In practice, this uninuclear form sets it apart from the others listed: Giardia duodenalis trophozoites are characteristically binucleate, Balantidium coli trophozoites show a ciliate with a prominent macronucleus (and micronucleus in ciliates), and Dientamoeba fragilis trophozoites are typically described as having more than one nucleus. So the presence of one nucleus in the trophozoite point directly to Chilomastix mesnili.

Understanding how many nuclei a trophozoite has helps distinguish these parasites under the microscope. Chilomastix mesnili has a trophozoite with a single nucleus, which is a defining feature of this organism. In practice, this uninuclear form sets it apart from the others listed: Giardia duodenalis trophozoites are characteristically binucleate, Balantidium coli trophozoites show a ciliate with a prominent macronucleus (and micronucleus in ciliates), and Dientamoeba fragilis trophozoites are typically described as having more than one nucleus. So the presence of one nucleus in the trophozoite point directly to Chilomastix mesnili.

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