Sporothrix

Sporothrix is a genus of fungi that includes several species, most notably Sporothrix schenckii. These fungi are dimorphic, meaning they can exist in two forms: a yeast form at body temperature and a mold form at room temperature. They are commonly found in soil, decaying vegetation, and on thorny plants, earning them the nickname "rose gardener's disease" due to frequent transmission through thorn pricks.

Sporothrix schenckii is the primary agent responsible for sporotrichosis, a fungal infection that can affect the skin, lymphatics, and, less commonly, the lungs or disseminated sites. The most frequent presentation is lymphocutaneous sporotrichosis, where an initial lesion appears at the site of inoculation, often a small bump or sore. This lesion may then spread along the lymphatic vessels, forming a series of nodules or ulcers.

Diagnosis typically involves microscopic examination of tissue or pus samples, along with fungal cultures. Treatment for localized cutaneous sporotrichosis usually involves antifungal medications, often itraconazole. Amphotericin B may be used for more severe or disseminated infections. Prevention involves avoiding contact with contaminated soil and plant material, and wearing protective gloves and clothing when gardening or handling such materials.