Parasitology · NEET PG Preparation Microbiology
A 32-year-old HIV-positive patient with a CD4 count of 50 cells/uL presents with severe headache and confusion. Brain MRI shows multiple ring-enhanci…
Practice question from Parasitology (NEET PG Preparation Microbiology), with the correct answer and a step-by-step solution.
hard · MCQ · Q-79BA0D
A 32-year-old HIV-positive patient with a CD4 count of 50 cells/uL presents with severe headache and confusion. Brain MRI shows multiple ring-enhancing lesions with surrounding edema. He owns a pet cat. Which of the following is the definitive diagnostic method or primary finding for the most likely organism?
- A.Crescent-shaped tachyzoites seen in CSF smear or brain biopsyCorrect answer
- B.Trypomastigotes in peripheral blood smear
- C.Oocysts identified via modified acid-fast staining of stool
- D.Flask-shaped trophozoites with ingested RBCs
Solution
The patient has cerebral toxoplasmosis caused by Toxoplasma gondii. Histologically, it is characterized by crescent-shaped tachyzoites and tissue cysts containing bradyzoites visible in brain tissue or CSF.
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