Sporotrichosis
Overview
- Pathogen is Sporothrix schenckii, a dimorphic fungus with yeast/hyphae 25/37 °C — in gardeners after minor injuries from plant thorns.
- Manifestation weeks-months after injury on hands/forearms with bluish-red nodules/plaques and a tendency to ulceration.
- Sporotrichoid arrangement: linear ascending nodules along lymphatic vessels — important differential diagnosis to M. marinum (same pattern!).
Overview
- Clinical features: papulonodular lesions with lymphangitic spread ("sporotrichoid course")
- Transmission: roses, soil
- Differential diagnoses: atypical mycobacteria, nocardiosis
Differential diagnoses
- Mycosis fungoides
- Cutaneous leishmaniasis
- Granuloma annulare
- Necrotizing fasciitis
- Erythema nodosum
- Erythema migrans (Lyme disease)
- Swimming Pool Granuloma
Practise Sporotrichosis in the app
Flashcards with spaced repetition, exam questions and spot-the-diagnosis on this topic – in DermaFuchs, free of charge.
In the DermaFuchs app: 4 flashcards · 1 clinical images
Open in browser Download on the App StoreSources (selection)
More bacterial skin infections
Note: This page is intended for medical education and does not replace diagnosis or treatment decisions in individual cases. Treatment and follow-up content is available in the app.