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幽门螺杆菌 (Ｈｐ)感染是慢性胃十二指肠疾病的病因之一。Ｈｐ的致病性强弱与其是否产生毒素相关蛋白 (ＣａｇＡ)有关。ＣａｇＡ阳性株比阴性株更有致病性和感染性。用抗ＣａｇＡ -ＩｇＧ的血清学检测 ,反映ＣａｇＡ阳性株的感染有较高的敏感性 ( 96 2 % )和特异性( 96 6% ) [1
Helicobacter pylori (Hp) infection is one of the causes of chronic gastroduodenal diseases. The pathogenicity of Hp is related to whether it produces toxin-related protein (CagA). CagA-positive strains are more pathogenic and infectious than the negative ones. Serological tests with anti-CagA-IgG showed higher sensitivity (96 2%) and specificity (96 6%) [1