streptomyces natalensis streptomyces natalensis streptomyces natalensis is a bacterial species in the genus streptomyces. streptomyces natalensis scientific classification kingdom: bacteria phylum: actinomycetota class: actinomycetia order: actinomycetales family: streptomycetaceae genus: streptomyces species: s. natalensis binomial name streptomyces natalensisstruyk et al. 1958 uses natamycin is an antifungal agent produced during fermentation by s. natalensis.