Like many other antifungals and Antibiotics , Nystatin is of bacterial origin. It was isolated from Streptomyces noursei in 1950 by Elizabeth Lee Hazen and Rachel Fuller Brown, who were doing research for the Division of Laboratories and Research of the New York State Department of Health. The soil sample where they discovered nystatin was from the garden of Hazen's friends called Nourses, therefore the strain was called noursei. Hazen and Brown named Nystatin after the New York State Public Health Department (now known as the Wadsworth Center) in 1954.