title: [Surveillance on antibody levels of diphtheria, pertusis and tetanus in health population in Shenzhen].
abstract: OBJECTIVE
  To know the antibody levels of DDT and the immunization effect of DPT vaccine in health population in Shenzhen, and to provide theoretic basis for the immunization strategy of DPT.
  
  
  METHODS
  Antibody of pertusis was tested by agglutination tests, antibodies of diphtheria and tetanus were tested by IHA tests.
  
  
  RESULTS
  The antibody positive rate of diphtheria, pertusis and tetanus were 88.31%, 71.54% and 92.77% respectively. The protective rate were 87.38%, 64.15% and 37.23% respectively. The GMT of diphtheria, pertusis and tetanus were 0.2595, 0.5607 and 1:156.87 respectively.
  
  
  CONCLUSIONS
  The antibody levels of diphtheria, pertusis and tetanus decreased by age, we should carry out DT booster immunization in freshmen of middle school, colleges and adults.
authors.affiliation: Shenzhen Center for Disease Control and Prevention, Shenzhen, 518020, Guangdong, China.
authors.forename: Yue-hong
authors.initials: YH
authors.lastname: Liu
authors.forename: Zi-yan
authors.initials: ZY
authors.lastname: Lu
authors.forename: Fu-xiang
authors.initials: FX
authors.lastname: Shan
mesh_terms: D000293:Adolescent; D000907:Antibodies, Bacterial / Q000097:blood* / Q000276:immunology; D002648:Child; D002675:Child, Preschool; D002681:China; D004165:Diphtheria / Q000097:blood* / Q000276:immunology / Q000517:prevention & control; D015721:Diphtheria-Tetanus-Pertussis Vaccine / Q000008:administration & dosage / Q000276:immunology; D006304:Health Status; D006801:Humans; D007223:Infant; D011159:Population Surveillance; D013742:Tetanus / Q000097:blood* / Q000276:immunology / Q000517:prevention & control; D014917:Whooping Cough / Q000097:blood* / Q000276:immunology / Q000517:prevention & control
chemical_list: D000907:Antibodies, Bacterial; D015721:Diphtheria-Tetanus-Pertussis Vaccine