Mucormycosis – A rare infection caused by different fungi that belong to a group of fungi called Mucoromycotina. These fungi typically live in soil and in association with decaying organic matter, such as leaves, compost piles, or rotten wood.1  Symptoms.2  Risk and Prevention. 3  Diagnosis and Testing.. neoformans infection. C. neoformans cryptococcosis – Caused by Cryptococcus neoformans, a fungus that lives in soil throughout the world. Cryptococcal meningitis is serious problem in resource-limited countries with a high burden of HIV/AIDS.