Pseudomonas mesophilica and an unnamed taxon, clinical isolates of pink-pigmented oxidative bacteria

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Abstract
Twenty-one strains of pink-pigmented bacteria, isolated from human clinical specimens and an environmental source, were compared with P. mesophilica ATCC 29983 and Protaminobacter ruber ATCC 8457. These isolates were gram-negative, oxidative rods which were motile by means of a single polar flagellum; gave positive catalase, indophenol oxidase, urease and amylase reactions; and grew slowly at 30.degree. C. Fourteen isolates conformed to the designated type strains P. mesophilica ATCC 29983 and P. ruber ATCC 8457. The remaining 7 strains represented an undescribed taxon. These pink bacteria appear to be invaders of debilitated patients with an underlying chronic disease.