]> 2026-07-31T11:51:09+00:00 WBR0187 0 en ''Candida albicans'' ''Candida albicans'' is a dimorphic fungus that characteristically forms pseudohyphae and budding yeasts at 25°C and germ tubes at 37°C. ''Aspergillus fumigatus'' ''Aspergillus fumigatus'' is a monomorphic filamentous fungus that has dichotomously branching septate hyphae at acute angles usually <40°. ''Blastomyces dermatitidis'' ''Blastomyces dermatitidis'' forms hyphae with nondescript conidia. The tissue form is a broad-based budding yeast. ''Rhizopus microsporus'' ''Rhizopus microsporus'' is on species responsible for mucormycosis. Similar to most zygomycetes it forms broad ribbon-like nonseptate hyphae frequently branching at near right degree angles. ''Sporothrix schenckii'' ''Sporothrix schenckii'' is a dimorphic fungus that forms cigar-shaped yeast in tissue. At 25°C it forms septate hyphae with oval-shaped, glass-like spores. Microbiology A 42-year-old man with history significant for poorly controlled diabetes mellitus presents to the emergency department with a 2-day history of fever, headache, and facial swelling. Following an extensive work-up, a nasal biopsy frozen section reveals necrotic tissue with irregularly wide, non-septate hyphae branching at right angles. What is the most likely causative agent of this patient’s condition? D Infectious Disease 2020-10-27T23:38:36Z 2459150.4851389 WBR0187