title: [Epidemiological study on leptospirosa infection of host animals and healthy population in flood areas].
abstract: OBJECTIVE
  To investigate the infection of leptospirosa of host animals and the immune level of healthy population in flood areas.
  
  
  METHODS
  Korth culture was used to culture leptospira for rodent kidney and oxen urine sample. The serogroups of leptospira and leptospira antibody were tested by microscopic agglutination test (MAT).
  
  
  RESULTS
  In flood regions, draw-near-flood region, and new migration region, rodent density was 6.95%, 6.28%, and 8.67%, respectively. The positive rates of rodent with leptospira was 4.63%, 1.35%, and 3.13%, respectively. Leptospira positive rates of oxen urine were 5.88%, 5.98%, and 1.75%, respectively. The main serogroup of leptospira was Icterhamorrhagic and Canicola serogroup. The positive rates of leptospirosa antibody in healthy population was 45.91%, 62.30%, and 58.67%in these 3 regions respectively, which was significantly higher than the average level in China. The dominant serogroups of leptospira in health population were icterhamorrhagic, autumnalis, canicola, pomona and bataviae. The positive rate of antibody had no difference among different age groups.
  
  
  CONCLUSIONS
  The main host animals are rodents and oxen infected with leptospira and the positive rate of leptospira antibody is high in healthy population in the study area. The dominant serogroups in host animals are similar to that in healthy population, which is mostly icterhaemorrhagic.
authors.affiliation: School of Public Health, Central South University,Changsha 410008,China.
authors.forename: Jia
authors.initials: J
authors.lastname: Zhou
authors.forename: Xin
authors.initials: X
authors.lastname: Huang
authors.forename: Huaxian
authors.initials: H
authors.lastname: He
authors.forename: Xiao
authors.initials: X
authors.lastname: Zhang
authors.forename: Aizhong
authors.initials: A
authors.lastname: Liu
authors.forename: Tubao
authors.initials: T
authors.lastname: Yang
authors.forename: Shuoqi
authors.initials: S
authors.lastname: Li
authors.forename: Xuemin
authors.initials: X
authors.lastname: Tang
authors.forename: Hongzhuan
authors.initials: H
authors.lastname: Tan
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood* / Q000652:urine*; D002417:Cattle; D002681:China / Q000453:epidemiology; D004190:Disasters; D055868:Floods; D006801:Humans; D007921:Leptospira interrogans / Q000276:immunology / Q000302:isolation & purification*; D007922:Leptospirosis / Q000453:epidemiology*; D015995:Prevalence; D051381:Rats; D016036:Seroepidemiologic Studies
chemical_list: D000907:Antibodies, Bacterial