title: [Study on the epidemiological characteristics of hemorrhagic fever with renal syndrome in Inner Mongolia].
abstract: OBJECTIVE
  In order to better understand the epidemiological features of Hantviruses in Inner Mongolia.
  
  
  METHODS
  Epidemiological surveillance data during the period of the past 52 years were analyzed. An epidemiological survey was carried out in the main epidemic areas in 2005.
  
  
  RESULTS
  A total of 8310 hemorrhagic fever with renal syndrome (HFRS) cases were reported in Inner Mongolia from 1955 to 2006, and distributed in 61 counties. HFRS cases were mainly distributed in the east part of Inner Mongolia before 1990. However, HFRS cases had occurred in the middle and western parts since 1990. Hulunbeier prefecture, from the eastern part of Inner Mongolia, had been the most severe area being hit by HERS since the first outbreak in 1955, with 7369 cases reported over the past 52 years, and accounted for 88.68% of the total cases in the whole autonomous region. Although no HFRS cases had been reported before 1999 in Bayannaoer which located in the western part of Inner Mongolia, a total of 95 cases were reported in 2005. Hantavirus antigens had been detected in 11 species of rodents so far,including Apodemus agrarius, Rattus norvegicus, Mus Musculus, Cricetulus barabensis, meriones meridianus, Microtus maximowiczii , Clethrionomys rutilus, Apodemus peninsulae, Phodopus roborvskii, Dipus sagitta and Allactaga sibirica.
  
  
  CONCLUSIONS
  Results suggested that the epidemics might remain at a relatively high level in the years to come in Inner Mongolia. Furthermore, there might be other types of Hantaviruses in addition to the already identified Seoul viral type in this area.
authors.affiliation: National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China.
authors.forename: Feng-xian
authors.initials: FX
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Zou
authors.forename: Hua-xin
authors.initials: HX
authors.lastname: Chen
authors.forename: Shao-hong
authors.initials: SH
authors.lastname: Yan
authors.forename: Gaowa
authors.initials: G
authors.lastname: Hasen
authors.forename: Jian-bo
authors.initials: JB
authors.lastname: Wang
authors.forename: Chun-fu
authors.initials: CF
authors.lastname: Li
authors.forename: Shi-ying
authors.initials: SY
authors.lastname: Zhang
authors.forename: Zhi-wei
authors.initials: ZW
authors.lastname: Zhao
authors.forename: Yong-zhen
authors.initials: YZ
authors.lastname: Zhang
mesh_terms: D000818:Animals; D002681:China / Q000453:epidemiology; D004196:Disease Outbreaks; D006476:Orthohantavirus / Q000302:isolation & purification; D006480:Hemorrhagic Fever with Renal Syndrome / Q000453:epidemiology*; D006801:Humans; D017720:Molecular Epidemiology; D012376:Rodent Diseases / Q000453:epidemiology / Q000821:virology; D012377:Rodentia / Q000821:virology; D015047:Zoonoses / Q000453:epidemiology* / Q000821:virology