title: [Epidemiological characteristics and molecular typing of Salmonella in Beijing from 2008 to 2009].
abstract: OBJECTIVE
  To study the epidemiological characteristics and molecular phenotypes of Salmonella by pulsed-field gel electrophoresis (PFGE) in Beijing from 2008 to 2009.
  
  
  METHODS
  A total of one hundred thirty-seven isolates recovered from the WHO Global Salmonella Surveillance system and entero clinic surveillance system were identified by biochemical tests and serotyping. The related epidemiological informations were also analyzed. The isolates were further typed by PFGE.
  
  
  RESULTS
  The prevalence of Salmonella from 2008 to 2009 showed obvious seasonal character. High incidence occurred from June to September, and 64.1% (84/131) isolates were recovered in this period. Patients of 18 - 40 year-old were 46.1% (58/128) and 80 patients were male and 40 patients were female with the ratio of 1.57:1. These 137 Salmonella isolates belonged to 20 serotypes, including Enteritidis (46.7%, 64/137) and Typhimurium (17.5%, 24/137) as the dominant serotype. In total, 71 PFGE profiles were identified. Four PFGE patterns of S. Enteritidis isolates (JEGX01.CN0001, JEGX01.CN0003, JEGX01.CN0002, JEGX01.CN0019) and S. Typhimurium pattern of JPXX01.CN0001 were dominant patterns.
  
  
  CONCLUSIONS
  The prevalence of Salmonella from 2008 to 2009 showed distribution characteristics of sex, age and seasons. The numerous PFGE patterns of Salmonella showed diversity of these isolates and different clones existed in Beijing.
authors.affiliation: Department of Infectious and Endemic Diseases Control, Beijing Center for Disease Prevention and Control, Beijing 100013, China.
authors.forename: Mei
authors.initials: M
authors.lastname: Qu
authors.forename: Fang
authors.initials: F
authors.lastname: Huang
authors.forename: Xin
authors.initials: X
authors.lastname: Zhang
authors.forename: Dai-tao
authors.initials: DT
authors.lastname: Zhang
authors.forename: Gui-rong
authors.initials: GR
authors.lastname: Liu
authors.forename: Zhi-Gang
authors.initials: ZG
authors.lastname: Cui
authors.forename: Han-qiu
authors.initials: HQ
authors.lastname: Yan
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liu
authors.forename: Zhan-ying
authors.initials: ZY
authors.lastname: He
authors.forename: Xiang-feng
authors.initials: XF
authors.lastname: Dou
authors.forename: Biao
authors.initials: B
authors.lastname: Kan
authors.forename: Quan-yi
authors.initials: QY
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D015373:Bacterial Typing Techniques; D002681:China / Q000453:epidemiology; D004269:DNA, Bacterial / Q000302:isolation & purification; D016521:Electrophoresis, Gel, Pulsed-Field; D005260:Female; D005516:Food Microbiology; D006801:Humans; D008297:Male; D058889:Molecular Typing; D012475:Salmonella / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D012480:Salmonella Infections / Q000453:epidemiology / Q000382:microbiology*; D012703:Serotyping; D055815:Young Adult
chemical_list: D004269:DNA, Bacterial