Sporothrix schenckii: Cigar Yeast and Flowerette Conidia
Original bench-card visual for recognizing Sporothrix: cigar-shaped yeast in tissue and flowerette conidia in mold phase.
Sporothrix: cigar yeast and flowerette conidia
Sporothrix is dimorphic. Tissue yeast may be cigar-shaped and sparse; mold phase can show conidia arranged like a small flowerette at the conidiophore tip.
Cigar-shaped yeast forms are classic but may be few in tissue. Look for compatible morphology in the right clinical context.
Conidia may cluster at the tip of a conidiophore in a flowerette arrangement. Culture work follows dimorphic fungus safety workflow.
Cigar-shaped yeast forms are classic but may be few in tissue. Look for compatible morphology in the right clinical context.
Conidia may cluster at the tip of a conidiophore in a flowerette arrangement. Culture work follows dimorphic fungus safety workflow.
Sporothrix anchors
| Visual clue | Meaning | Student shorthand |
|---|---|---|
| Cigar-shaped yeast | Tissue clue | May be sparse; do not expect every field to show it |
| Flowerette conidia | Mold phase clue | Conidia cluster at conidiophore tip |
| Lymphocutaneous context | Clinical pattern | Specimen source can support the morphology |
| Dimorphic mold handling | Safety workflow | Use approved culture procedures |
Sporothrix interpretation guide
| Pattern | What to call it | How to think about it |
|---|---|---|
| Cigar-shaped yeast in tissue | Sporothrix-compatible clue | Correlate with culture and clinical pattern |
| Flowerette conidia in mold phase | Sporothrix mold-phase clue | Confirm through approved workflow |
| Broad-based budding yeast | Blastomyces pattern | Different dimorphic yeast morphology |
- Sporothrix teaches the difference between tissue yeast clues and culture mold clues.
- Cigar yeast is high-yield but not always abundant.
- Flowerette conidia make a clean visual anchor for the mold phase.
Sporothrix = cigar yeast in tissue, flowerette conidia in mold.