Abstract
Five reference strains and 314 field strains ofCampylobacter growing at 42°C, but not at 25°C, were characterized by tests of hippurate hydrolysis and sensitivity to nalidixic acid, to metronidazole, and to 2,3,5-triphenyltetrazolium chloride (TTC). All strains but seven were TTC-resistant by the disc test used. Of 168 human isolates, 87% hydrolyzed hippurate; three of these strains were nalidixic acid-resistant. Also hippurate-positive were all 23 strains from ovine abortion, 79% of 43 avian strains, two of six bovine isolates, and one of two strains of equine origin. Seventy-two porcine strains were all hippurate-negative. Metronidazole sensitivity was found to be a variable property in hippurate-positive strains, although present in all but four hippurate-negative strains. A group of eight nalidixic acid-resistant, hippurate-negative isolates of porcine and bovine origin probably represent a new group ofCampylobacter.
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Walder, M., Sandstedt, K. & Ursing, J. Phenotypic characteristics of thermotolerantCampylobacter from human and animal sources. Current Microbiology 9, 291–295 (1983). https://doi.org/10.1007/BF01567203
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DOI: https://doi.org/10.1007/BF01567203