title: Assessing prevention measures and Sin Nombre hantavirus seroprevalence among workers at Yosemite National Park.
abstract: BACKGROUND
  During 2012, a total of 10 overnight visitors to Yosemite National Park (Yosemite) became infected with a hantavirus (Sin Nombre virus [SNV]); three died. SNV infections have been identified among persons with occupational exposure to deer mice (Peromyscus maniculatus).
  
  
  METHODS
  We assessed SNV infection prevalence, work and living environments, mice exposures, and SNV prevention training, knowledge, and practices among workers of two major employers at Yosemite during September-October, 2012 by voluntary blood testing and a questionnaire.
  
  
  RESULTS
  One of 526 participants had evidence of previous SNV infection. Participants reported frequently observing rodent infestations at work and home and not always following prescribed safety practices for tasks, including infestation cleanup.
  
  
  CONCLUSIONS
  Although participants had multiple exposures to deer mice, we did not find evidence of widespread SNV infections. Nevertheless, employees working around deer mice should receive appropriate training and consistently follow prevention policies for high-risk activities.
authors.affiliation: California Department of Public Health, Richmond, California.|Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia.
authors.forename: Jason A
authors.initials: JA
authors.lastname: Wilken
authors.affiliation: California Department of Public Health, Richmond, California.|Council of State and Territorial Epidemiologists, Applied Epidemiology Fellow, Atlanta, Georgia.
authors.forename: Rebecca
authors.initials: R
authors.lastname: Jackson
authors.affiliation: California Department of Public Health, Richmond, California.
authors.forename: Barbara L
authors.initials: BL
authors.lastname: Materna
authors.affiliation: California Department of Public Health, Richmond, California.
authors.forename: Gayle C
authors.initials: GC
authors.lastname: Windham
authors.affiliation: California Department of Public Health, Richmond, California.
authors.forename: Barryett
authors.initials: B
authors.lastname: Enge
authors.affiliation: California Department of Public Health, Richmond, California.
authors.forename: Sharon
authors.initials: S
authors.lastname: Messenger
authors.affiliation: California Department of Public Health, Richmond, California.
authors.forename: Dongxiang
authors.initials: D
authors.lastname: Xia
authors.affiliation: National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Controland Prevention, Atlanta, Georgia.
authors.forename: Barbara
authors.initials: B
authors.lastname: Knust
authors.affiliation: National Park Service, Office of Public Health, Fort Collins, Colorado.
authors.forename: Danielle
authors.initials: D
authors.lastname: Buttke
authors.affiliation: California Department of Public Health, Richmond, California.
authors.forename: Rachel
authors.initials: R
authors.lastname: Roisman
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D002140:California; D018804:Hantavirus Pulmonary Syndrome / Q000097:blood* / Q000517:prevention & control / Q000523:psychology / Q000635:transmission; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D009784:Occupational Diseases / Q000097:blood* / Q000517:prevention & control / Q000523:psychology; D016273:Occupational Exposure / Q000517:prevention & control; D000068316:Parks, Recreational; D010542:Peromyscus / Q000821:virology*; D016036:Seroepidemiologic Studies; D029261:Sin Nombre virus / Q000276:immunology*; D011795:Surveys and Questionnaires
chemical_list: D000914:Antibodies, Viral
keywords: Sin Nombre virus; disease transmission; hantavirus; infectious; occupational health