Mycoplasma hyopharyngis, a New Species from Swine

Abstract
Seven arginine-utilizing mycoplasmas isolated from upper respiratory tracts of normal swine were shown to be serologically distinct from other arginine-utilizing species previously isolated from swine. The isolates required sterol for growth but did not utilize glucose or urea. The isolates were distinct from over 80 additional mycoplasmas, as determined by epiimmunofluorescence and growth inhibition tests. Based on morphological, biological, and serological properties, we proposed that these strains constitute a new mycoplasma species, Mycoplasma hyopharyngis. Strain H3-6B F (ATCC 35707) has been designated as the type strain.

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