title: [An outbreak of gastroenteritis caused by poisonous Boletus mushroom in Sichuan, China, 2012].
abstract: OBJECTIVE
  To identify the source of infection and risk factors and to provide control measures regarding an outbreak of gastroenteritis involving 30 villagers. Who attended the same wedding party held on March 5(th), 2012, a survey was carried out.
  
  
  METHODS
  Case was defined as having onset of vomiting, nausea, stomachache or diarrhea among the attendees of a wedding party. We randomly selected and interviewed 140 from 470 attendees on their symptoms and food exposures at the wedding. We compared food-specific attack rates (AR) for gastroenteritis in a retrospective cohort study. The leftover foods were tested for Salmonella, Shigella, and Staphylococcus aureus. The leftover Boletus mushrooms were examined and species determined by the Kunming Institute of Botany, Chinese Academy of Sciences.
  
  
  RESULTS
  Of the 140 attendees 61% (85) developed gastroenteritis. Case-attendees had vomiting (94%), nausea (89%), stomachache (53%), and diarrhea (51%). The AR among attendees who ate Boletus mushroom was 69% (81/118), compared to 18% (4/22) of those who did not (RR = 3.8, 95%CI: 1.5 - 9.2). When comparing the ARs between the attendees on consumption of other foods, data did not show statistically significant differences. Among the 7 species of Boletus identified from the leftover mushrooms, 3 (B. venenatus, B. sinicus and B. magnificus) were toxic. Store keepers bought dried or fresh mushrooms from local villagers who had picked up them from the mountains. Salmonella, Shigella, and Staphylococcus aureus tests on those leftover food showed negative results.
  
  
  CONCLUSIONS
  Poisonous Boletus mushroom contributed to this outbreak. We recommended that education should be targeted on mushroom-pickers regarding how to recognize the poisonous mushrooms. Regulations and laws should also be developed to facilitate the necessary process.
authors: Chinese Field Epidemiology Training Programme (CFETP), Chinese Center for Disease Control and Prevention, Beijing 100050, China.
authors: Ya-jun
authors: YJ
authors: Sun
authors: Wei
authors: W
authors: Yuan
authors: Lun-guang
authors: LG
authors: Liu
authors: Li-jie
authors: LJ
authors: Zhang
authors: Guo-qing
authors: GQ
authors: Shi
authors: Qi-xing
authors: QX
authors: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D000363:Agaricales; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D015331:Cohort Studies; D003967:Diarrhea / Q000453:epidemiology / Q000209:etiology; D004196:Disease Outbreaks; D005759:Gastroenteritis / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009145:Mushroom Poisoning / Q000453:epidemiology*; D012189:Retrospective Studies; D014839:Vomiting / Q000453:epidemiology / Q000209:etiology; D055815:Young Adult