title: Genotypic and phenotypic diversity of Salmonella enteritidis isolated from chickens and humans in Korea.
abstract: Salmonella Enteritidis is the most common cause of salmonellosis in humans in South Korea. It has been recognized that the principal source of human infection with S. Enteritidis is chickens and their products such as meat and eggs. A total of 173 S. Enteritidis isolates from humans (65 isolates) and chickens or their products (108 isolates) were analyzed by antibiotic susceptibility assay, phage typing, and pulsed-field gel electrophoresis (PFGE). Drug resistance was found to streptomycin (32.3%), ampicillin (30.6%), nalidixic acid (30.1%), ticarcillin (30.1%), and tetracycline (28.3%). More than 70% of the isolates were found to be resistant to one or more antibiotics tested. The most frequent patterns of resistant isolates were resistance to nalidixic acid only (28.3%) and resistance to two antibiotics (four combinations; 20.2%). The most predominant phage type (PT) was PT1 (27.2%) followed by PT21 (20.8%) and PT4 (8.7%) in chicken and human isolates. Nineteen different PFGE patterns were found among the 173 isolates, and A1 was the most common PFGE pattern, followed by A6 (17.3%). Most S. Enteritis isolates (except two isolates with patterns B and C) showed similar PFGE patterns that differed by only a few bands. These results show that 2 or 3 subtypes of S. Enteritidis are shared to a large extent by humans and chickens. This implies the possibility of the spread of chicken S. Enteritidis to humans.
authors: School of Veterinary Medicine, Kangwon National University, South Korea.
authors: Zheng-Wu
authors: ZW
authors: KANG
authors: Ji-Hun
authors: JH
authors: JUNG
authors: Sung Hun
authors: SH
authors: KIM
authors: Bok Kwon
authors: BK
authors: LEE
authors: Duk Young
authors: DY
authors: LEE
authors: Young Jo
authors: YJ
authors: KIM
authors: Ji Youn
authors: JY
authors: LEE
authors: Ho-Keun
authors: HK
authors: WON
authors: Eun Hee
authors: EH
authors: KIM
authors: Tae-Wook
authors: TW
authors: HAHN
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002645:Chickens; D024901:Drug Resistance, Multiple, Bacterial; D006801:Humans; D007723:Korea / Q000453:epidemiology; D011201:Poultry Diseases / Q000453:epidemiology / Q000382:microbiology*; D012480:Salmonella Infections / Q000453:epidemiology / Q000382:microbiology*; D012477:Salmonella enteritidis / Q000166:cytology* / Q000235:genetics*
chemical_list: D000900:Anti-Bacterial Agents