Right Health says, "While most individuals are exposed to the fungi on a regular basis those with immune disorders are more prone to an infection. As such, it usually infects those who are immunocompromised. The condition may affect the gastrointestinal tract or the skin. It usually begins in the nose and paranasal sinuses and is one of the most rapidly spreading fungal infections in humans. Common symptoms include thrombosis and tissue necrosis. Treatment consists of prompt and intensive antifungal drug therapy and surgery to remove the infected tissue. The prognosis varies vastly depending upon an individual patient's circumstances."