4Yah H, Yagyu F, Okitsu S, et al. Detection of norovirus ( GI,GII), sapovirus and astrovirus in fecal samples using reverse transcription single-round multiplex PCR[ J]. J Virol Methods,2003,114(1) :37-44.
5Moreno-Espinoaa S, Farkas T,Jiang X. Human caliciviruses and pediatric gastroenteritis [ J ]. Semin Pediatr Infect Dis, 2004,15(4) :237-245.
6Parashar UD, Li JF, Cama R, et al. Human caliciviruses as a cause of severe gastroenteritis in Peruvian children [ J ]. J Infect Dis ,2004,190 ( 6 ) : 1088-1092.
7De Grazia S, Giammanco GM, Colomba C, et al. Molecular epidemiology of astrovims infection in Italian children with gastroenteritis[ J]. Clin Mierobiol Infect,2004,10( 11 ) :1025-1029.
8Clark B, McKendrick M. A review ot viral gastroenteritis [ J ].Curt Opin Infect Dis,2004,17 ( 5 ) : 461-469.
