GPR: 2020 - Week 48

• GPR Quiz
• Answer
• DDx1
• DDx2
• Acknowledgments
• Reference(s)

Clinical history

78 year old with fungemia. A CHROMagar shows:

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Candida albicans Smooth, creamy, white colonies with feet on blood agar Apple green color on CHROMagar Causes a wide variety of clinical diseases, including thrush, esophagitis, UTIs, and fungemia Germ tube positive Chlamydospores Pseudohyphae and true hyphae

Candida tropicalis Steel blue that diffuses into pink on CHROMagar Blastoconidia at septa and between septa Germ tube negative Second most virulent Candida species after Candida albicans Strong biofilm producer Cream-colored dull colonies with slightly wrinkled edges

Candida krusei Flat, dry pink on CHROMagar Spread radially on SAB or blood agar Off-white, dull colonies with smooth to lobed margins Extremely elongated, rarely branched pseudohyphae Germ tube negative Opportunistic pathogen that causes multi drug resistant disease

• Evan Mojica
• Dr. Julian Villalba

• Manual of Clinical Microbiology, 11th edition
• https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3071170/

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This week's Gross Pathology Roundup was presented by Bianca Christensen MD on 2020-11-23.