Abstract
The name "Campylobacter hyointestinalis" sp. nov. is proposed for a Campylobacter species that was isolated from the intestines of pigs with proliferative enteritis. "C. hyointestinalis" is also found in the feces of cattle and has been isolated from the intestine of a hamster. "C. hyointestinalis" is distinguished from previously described catalase-positive Campylobacter species by colony morphology, ability to produce H2S in triple sugar iron agar, ability to grow anaerobically in 0.1% trimethylamine N-oxide hydrochloride, resistance to nalidixic acid, susceptibility to cephalothin and metronidazole, and hydrogenase activity. Sixteen "C. hyointestinalis" strains were highly related (greater than or equal to 76%) by DNA-DNA hybridization (hydroxyapatite method, 50 and 65 degrees C). Other Campylobacter species were less than or equal to 30% related to "C. hyointestinalis." The type strain of "C. hyointestinalis" is designated 80-4577-4 (= ATCC 35217), and its DNA has a guanine-plus-cytosine content of 36 mol%.
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