title: [Pathogenic diagnosis of an unexplained epidemic event of infectious diarrhea].
abstract: OBJECTIVE
  To determine the pathogen of an unexplained epidemic event of infectious diarrhea by laboratory diagnosis of suspected cases samples.
  
  
  METHODS
  28 samples from 28 suspected cases (22 fecal samples, 3 vomitus samples, 3 anus swab samples) were tested for Norovirus by RT-PCR. Sequencing and phylogenetic analysis were acomplished of 5 positive samples.
  
  
  RESULTS
  160 of 5694 population were ill with an attack rate of 2.81%. The peak period was 7-9, March. 14 of 28 samples were tested Norovirus positive.Sequencing and phylogenetic analysis showed Norovirus type GII/4 was the causative agent and it had highest identity (97. 9%) with epidemic strain 2006b.
  
  
  CONCLUSIONS
  The epidemic event ofinfectious diarrhea were caused by GII/4 Norovirus strains.
authors: Center for Disease Control Hunan Pronice, Changsha 410005, China.
authors: Yun-zhi
authors: YZ
authors: Liu
authors: Yi-wei
authors: YW
authors: Huang
authors: Miao
authors: M
authors: Jin
authors: Hong
authors: H
authors: Zhang
authors: Fu-qiang
authors: FQ
authors: Liu
authors: Jing
authors: J
authors: Wang
authors: Shi-xiong
authors: SX
authors: Hu
authors: Xin-hua
authors: XH
authors: Ou
authors: Zhao-jun
authors: ZJ
authors: Duan
mesh_terms: D004196:Disease Outbreaks; D004403:Dysentery / Q000175:diagnosis* / Q000453:epidemiology / Q000235:genetics; D005243:Feces / Q000821:virology*; D005759:Gastroenteritis / Q000453:epidemiology* / Q000821:virology; D006801:Humans; D017720:Molecular Epidemiology; D029322:Norovirus / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D010802:Phylogeny; D012367:RNA, Viral / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D012367:RNA, Viral