Cryptococcal infection in neonates is rare, and only a few cases of meningitis and disseminated fungemia due to Cryptococcus neoformans and Crycptococcus laurentii have … Show More Results Learn how UpToDate can help you. Cryptococcosis Symptoms, Treatment, Prevention & Causes The vast majority of cryptococcosis infections are caused by C. neoformans and C. gattii. Although there are over 50 Cryptococcus species, only a few other species rarely infect humans. In general, the people infected with C. neoformans usually have some defect in …