1Naumova EN, Egorov AI, Morris RD,et al. The elderly and water- borne gastroenteritis hospitalizations before and during the 1993 Milwaukee outbreak [J]. Emerg Infect Dis, 2003,9(4) :418-425.
5Naumova EN, Egorov AI, Morris RD, et al. The elderly and waterborne Cryptosporidium infection: gastroenteritis hospitalizations before and during the 1993 Milwaukee outbreak[J]. Emerg Infect Dis, 2003,9:418 425.
6Baron E J, Schenone C, Tanenbaum B. Comparison of three methods for detection of Cryptosporidium oocyst in low-prevalence population [ J ]. J Clin Microbio, 1989,27:223 - 224.
7Tzipori S, Smith M, Birch C, et al. Cryptosporidiosis in hospital patients with gastroenteritis[J]. Am J Trop Med Hyg,1983 ,32 :931 -934.
1Schneider T,Jahn HU,Schmidt W,et al.Loss of CD4 T Lymphocytesin patients infected with human immunodeficiency virus type I ismore pronounced in the duodenal mucosa than in the peripheralblood.Berlin Diarrhea/Wasting Syndrome Study Group[J].Gut,1995,37(4):524-529.