Abstract
Nine strains of Campylobacter species other than Campylobacter jejuni, Campylobacter coli, and Campylobacter laridis were isolated from patients with acute diarrhea. All nine strains showed preferred growth at 37 degrees C under microaerophilic conditions. Conventional microbiological tests and DNA-DNA dot blotting were used to identify these strains. Three of the nine Campylobacter strains hydrolyzed hippurate, reduced nitrate, produced catalase, were resistant to cephalothin, and were shown to be highly related to C. jejuni type strains. Two strains had negative or weak catalase activity and were hippurate negative. Three other strains had characteristics similar to those of Campylobacter cinaedi. The ninth strain, isolated from a homosexual man with antibodies to human immunodeficiency virus (human T-cell lymphotropic virus type III), showed unique features different from those of all the known campylobacters used in this study. This strain grew well at 25 and 37 degrees C and was catalase and nitrate positive, hippurate negative, and resistant to cephalothin.
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