title: Campylobacter laridis causing bacteremia in an immunosuppressed patient.
abstract: An unusual species, Campylobacter laridis , belonging to the group of nalidixic acid resistant thermophilic Campylobacter species, was isolated from the blood of a 71-year-old man with multiple myeloma, hyperviscosity syndrome, and renal failure. The organism was first recognized in the laboratory by gram-stain reaction and resistance to nalidixic acid. The organism differs from C. jejuni and C. coli by its resistance to nalidixic acid, whereas anaerobic growth in the presence of trimethylamine N-oxide hydrochloride differentiates this organism from other Campylobacter species. Biochemical characterization and DNA homology studies confirmed the identity of this species as being C. laridis . To our knowledge, this is the first recorded case of bacteremia due to C. laridis in humans.
mesh_terms: D000368:Aged; D001431:Bacteriological Techniques; D002167:Campylobacter / Q000145:classification / Q000187:drug effects / Q000235:genetics; D002169:Campylobacter Infections / Q000382:microbiology*; D004269:DNA, Bacterial; D004352:Drug Resistance, Microbial; D006801:Humans; D007108:Immune Tolerance; D008297:Male; D008744:Methylamines / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D009268:Nalidixic Acid / Q000494:pharmacology; D018805:Sepsis / Q000382:microbiology*
chemical_list: D004269:DNA, Bacterial; D008744:Methylamines; D009268:Nalidixic Acid; C005855:trimethyloxamine