4 MCQs in Microbiology for NEET PG
A 32-year-old man with HIV/AIDS (CD4 count 45 cells/μL) presents with a 3-week history of fever, headache, and neck stiffness. CSF analysis shows: protein 120 mg/dL, glucose 30 mg/dL (serum glucose 90 mg/dL), WBC 50 cells/μL (80% lymphocytes). India ink stain of CSF is negative. Which of the following is the most appropriate next diagnostic step?
A 28-year-old woman with a history of pigeon exposure presents with a 6-week history of cough, dyspnea, and low-grade fever. Chest X-ray shows bilateral hilar lymphadenopathy with a small right upper lobe infiltrate. Sputum smear for AFB is negative. A bronchial aspirate specimen is sent for fungal culture. Which of the following culture media and incubation conditions is most appropriate for isolating Cryptococcus neoformans from this respiratory specimen?
Which staining method is most commonly used for presumptive identification of Cryptococcus neoformans in clinical specimens?
Which of the following is the most specific confirmatory test for *Cryptococcus neoformans* in serum and cerebrospinal fluid?
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