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Abstract
The properties of 17 strains of a nocardioform actinomycete isolated from soil are described. The hyphae of the primary mycelium of this organism fragment into irregular to rod- to coccus-like elements. The hyphae of the aerial mycelium fragment into rod- to coccus-like elements with smooth surfaces. These elements give rise to new mycelia. The organism is a gram-positive, non-acid-fast, aerobic, mesophile, and it has a cell wall composition of type I (LL-diaminopimelic acid, alanine, glutamic acid, glycine). The deoxyribonucleic acid base composition is 66.5 mol% G+C. The actinomycete is susceptible to phages of a taxon-specific set. Polyvalent Nocardia and Streptomyces phages are not propagated in the nocardioform organism, which is here regarded as belonging to a new genus, Nocardioides, the type species of which is N. albus. The type strain of N. albus is IMET 7807 (Culture Collection of the Zentralinstitut für Microbiologie und experimentelle Therapie, Jena). It has been deposited in the American Type Culture Collection under the number 27980. The new genus is placed in the family Streptomycetaceae.
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