This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycology, Subject name: Microbiology
[{'content': 'Which is false about Penicillium marneffi? \nSelect and explain. \nA. Black colonies, B. Dimorphic fungi, C. Amphotericin B used for treatment, D. Causes fulminant infections in immunocompromised patients', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Penicillium Marneffei: It is the only dimorphic fungus in the genus Penicillium. Causes oppounistic infection (fulminant) in immunocompromised hosts, such as patients with HIV. Lab Diagnosis: - Direct Microscopy: Shows oval or elliptical yeast cells with central septation, which indicates that these cells divide by transverse fission rather than budding - Culture: P. marneffei produces yeast like colonies at 37degC and mould form at 25degC. The mould form has a characteristic diffusible brick red pigment. Treatment: AIDS patients with severe penicillinosis are treated with amphotericin B till the condition improves followed by maintenance therapy with itraconazole for 12 weeks. In mild penicilliosis, itraconazole is recommended for 12 weeks.', 'role': 'assistant'}]