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Campylobacter jejuni isolates from diarrhea patients and chickens in 2008 in Iksan, Korea were tested for biochemical characteristics, and for possession of genes hipO, mutated gyrA, and cdtB. Among the chickens tested 52% carried C. jejuni. All 28 patient isolates and 48 chickens isolates had typical biochemical characteristics, except for nalidixic acid resistance. All isolates from patients and chickens were resistant to ciprofloxacin, and had mutated gyrA gene indicating good correlation of the two tests. Analysis of pulsed-field gel electrophoresis (PFGE) pattern of SmaI-restricted DNA of 53 isolates showed 14 clusters. Twenty-eight patient isolates and two chicken isolates (57%) showed an identical pattern (cluster 9). Chicken isolates C37 and C48 (cluster 2), C31 and C33 (cluster 3), C29, C34, C35, and C36 (cluster 4), and C43, C44 (cluster 6) had identical patterns. All patient isolates, compared to 87% and 80% of chicken isolates, were susceptible to amikacin and chloramphenicol, respectively. Antibiotics with the lowest MIC?? were imipenem, gentamicin, and erythromycin, whereas, those with the highest were ampicillin and tetracycline. In conclusion, C. jejuni carriage rate of chickens in Iksan, Korea, was high, all 28 isolates from patients and two from chickens were an identical clone, whereas isolates from patients and remaining chickens were different clones with only 62% similarity, all isolates had hipO and cdtB genes, and all isolates were resistant to ciprofloxacin.

Cytolethal Distending Toxin Production, Genotypes and Atimicrobial Susceptibility of Campylobacter jejuni Isolates from Diarrhea Patients and Chickens