口腔幽门螺杆菌对胃幽门螺杆菌根除率的影响

目的　明确口腔幽门螺杆菌 (Helicobacterpylori,Hp)对胃幽门螺杆菌根除率的影响。方法　选择 10 2例有上腹部症状、并经全口牙周检查有不同程度牙周炎的患者进行胃镜检查 ,每例均取口腔标本进行Hp检测。用二氧化硅微粒法提取所有样本中的DNA ,引物选用尿素酶C基因和CagA基因进行PCR扩增。结果　胃Hp阳性组的口腔Hp检出率 (n =5 8,4 3.1% )高于胃Hp阴性组(n =4 4 ,2 2 .7% ) ,两者比较差异有显著性 (P <0 .0 5 )。 5 8例胃Hp阳性患者经药物治疗后 4周进行胃Hp的复查 ,其中口腔Hp阳性者的胃Hp根除率 (6 4 0 % ,16 / 2 5 )低于口腔Hp阴性者 (72 .7% ,2 4 / 33) ;治疗后 1年 ,口腔Hp阳性者的胃Hp根除率 (36 .0 % )与Hp阴性者的根除率 (6 3.6 % )相比差异有显著性 (P <0 .0 5 )。结论　胃Hp的根除率受口腔Hp存在的影响 ;口腔Hp阳性者的胃Hp根除率显著低于口腔Hp阴性者根除率

The relationship between Helicobacter pylori in oral cavity and the Hp infection in stomach

Objective To analyze the relationship between Helicobacter pylori (Hp) in oral cavity and the Hp infection in stomach. Methods 102 patients with gastric Hp infection and periodontitis were enrolled in this study. DNA was extracted from subgingival plaques, mouthwashs and stomach mucosa samples by using the glass-milk (SiO 2) purification method. To identify the presence of Hp in these samples, PCR (polymerase chain reaction) was carried out, and two pairs of oligonucleotide primer were used to amplify a portion of gene urease C and gene cag A of Hp. Results The rate of Hp detected in oral cavity was significantly higher in patients with positive Hp in stomach (43.1%, n= 58) than in those with negative Hp in stomach ( 22.7%, n= 44, P<0.05). After the treatment for gastric Hp infection for 4 weeks, the eradication rate of Hp in stomach was lower, but only slightly in patients with positive oral Hp(16/25, 64%)than in those with negative oral Hp(24 / 33, 72.7%). However, this difference became apparent (36.0% vs 63.6%, P<0.05) after one year of the treatment. Conclusions The effectiveness of the eradication therapy for gastric Hp infection is affected by the presence of Hp in oral cavity. Oral colonization of Hp may imply that there is a risk of the relapses of gastric and duodenal Hp infection and ulcer after the antibiotics treatment for the eradication of Hp.