title: Live poultry exposure, Guangzhou, China, 2006.
abstract: BACKGROUND
  Live poultry in wet markets and backyard husbandry comprise potentially major exposure sources for human cases of H5N1 avian influenza. In China the magnitude of risk from this exposure is unknown. We estimated exposure based on self-reported behavior.
  
  
  METHODS
  In January-March 2006, 1550 face-to-face interviews derived from stratified cluster and randomized within-household sampling provided data on live poultry exposure in Guangzhou, China based on self-reported buying and touching patterns. Standardized exposures were calculated and after adjustment extrapolated to the urban population.
  
  
  RESULTS
  The results, adjusted for gender, showed that 1,248/1,550 (80%, 95% Confidence Limits 78-82%) respondents reported an average of 20.5 live chicken purchases/household annually. Of those buying poultry 33% touched poultry before buying while 20% of households raised live poultry. Total exposures from wet market and backyard husbandry in Guangzhou greatly exceed those of adjacent Hong Kong (15,280,000 e/year vs. 1,110,900 e/year). Backyard exposure frequency likely exceeds that from live poultry retail, but purchases were more prevalent and hence comprise a significant risk source.
  
  
  CONCLUSIONS
  The Guangzhou population faces risks from the high prevalence of exposures during purchase and poultry rearing. Better management for raising and selling poultry in Guangzhou is needed.
authors.affiliation: Health and Health Care Behaviour Research Group, School of Public Health, University of Hong Kong, Hong Kong.
authors.forename: Qiuyan
authors.initials: Q
authors.lastname: Liao
authors.forename: Wing Tak
authors.initials: WT
authors.lastname: Lam
authors.forename: Gabriel M
authors.initials: GM
authors.lastname: Leung
authors.forename: Chaoqiang
authors.initials: C
authors.lastname: Jiang
authors.forename: Richard
authors.initials: R
authors.lastname: Fielding
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000822:Animal Husbandry; D000818:Animals; D002681:China; D003132:Commerce / Q000706:statistics & numerical data*; D004781:Environmental Exposure / Q000009:adverse effects*; D005260:Female; D006801:Humans; D053124:Influenza A Virus, H5N1 Subtype; D005585:Influenza in Birds / Q000635:transmission* / Q000821:virology; D007251:Influenza, Human / Q000209:etiology* / Q000635:transmission; D007407:Interviews as Topic; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D011200:Poultry; D018570:Risk Assessment; D055815:Young Adult