3Mitchell HM, Liyy, Hu PJ, et al. Epidemiology of Helicobacter pylori in Southern china:identification of early childhood as the critical period for acquisition[J]. J Infect Dis, 1992,166 :149-153
5Neale KR, Logan RP. The epidemilogy and transmission of Helicobacter pylori infection in children[J]. Aliment Pharmacol Ther, 1995,9(2):77-84
6Krajden S, Fuksa M, Anderson J, et al. Examination of human stomach biopsies, saliva and dental plaque for Campylobacter pylori[J]. J Clin Microbial, 1989,31 : 1397-1398
7Ferguson DA Jr, Li C, Patel NR, et al. Isolation of Helicobacter pylori from saliva[J]. J Clin Mierobiol, 1993, 31:2802-2804
8Turoi A, Gasbarrini, Fedell G, et al. The mode of transmission of Helicobacter pylori infection[J]. Recenti prog Med, 1997,88(5) : 232-236
9Marshall BJ,Warrem JR,Francis GJ ,et al. Rapid urease test in the management of Campylobaeter pylorids-assoeiated gastritis[J]. Am J Gastroenterol, 1987,82 : 200-210
10Desai HG, Gill HH, Shankaran K, et al. Dental plaque: a permanent reservoir of Helicobacter pylori[J]. Scand J Gastroenterol, 1991,26 : 1205-1208
