Fungus Sporothrix schenckii, causative agent of the infection sporotrichosis, computer illustration. Fungal threads of the vegetative mycelium are seen, each thread is called a hypha, with spores produced from some hyphae. It grows on moss, other plants or bark; infection is contracted through a skin wound; florists and gardeners are especially vulnerable. The wound ulcerates and can infect lymph nodes. In people with low resistance, cutaneous sporotrichosis may spread to lungs and joints. The more serious systemic form of this disease requires amphotericin B antifungal drug treatment.