What is the causative agent of Sporotrichosis?

Sporotrichosis is a fungal infection primarily caused by the dimorphic fungus Sporothrix schenckii. This organism is typically found in soil, decaying vegetation, and on some plant materials, such as rose thorns, which are common sources of infection.

When a person gets pricked or injured by contaminated material, the fungus can enter the body, leading to cutaneous sporotrichosis. This manifests as a nodular lesion at the site of entry that can progressively ulcerate. The infection can also spread through the lymphatics, leading to lymphocutaneous sporotrichosis, characterized by the appearance of additional nodules along the lymphatic tract.

The other organisms listed in the options have different associated diseases. Histoplasma capsulatum causes histoplasmosis, primarily affecting the lungs. Aspergillus fumigatus is linked to aspergillosis, which can lead to respiratory issues, particularly in immunocompromised individuals. Candida albicans is a yeast that is commonly associated with opportunistic infections, particularly in individuals with weakened immune systems, but it does not cause sporotrichosis.

Therefore, the only correct answer relating to the causative agent of sporotrichosis is Sporothrix schenckii