Nocardia amarae sp. nov., an Actinomycete Common in Foaming Activated Sludge

Abstract

One hundred and seven strains of nocardiae have been isolated from samples of activated sludge or from foam forming on activated sludge coming from 10 sewage-treatment plants in five states. Thirty-five of these strains belong to a previously undescribed species containing a novel type of nocardomycolic acid whose α branch is mono-unsaturated. The name proposed for this new species is Nocardia amarae. The type strain is IMRU W3960 (= ATCC 27808).