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Levin等调查了一次由急性肝炎恢复期牙科医生造成的乙型肝炎爆发,13例就诊者因此患肝炎,病人既无输血或与黄疸者接触史,亦无注射毒品史,推测系通过针头。注射器,或者唾液或血液的气溶胶传播。 Rimland等调查发现1例无症状携带HBsAg的口腔外科医生在4年内引起就诊的53例病人发生乙型盱炎:7例作了HBsAg亚型检查,其中6例与该医生相同。这种传播是勿庸置疑的,重要的是其频率多大。Williams等报告:2名HBsAg阳性肝炎潜伏期内(病前6周)的牙科医生所治疗的237例病人,进行
Levin et al. Investigated an outbreak of hepatitis B among dentists in the recovery phase of acute hepatitis. Thirteen patients were hepatitis-infected. Both patients had no history of blood transfusions or jaundice and had no history of drug injections, presumably passing through needles. Syringe, or aerosol spread of saliva or blood. Rimland et al. Found that in one of the 53 patients diagnosed within 4 years as one of the asymptomatic HBsAg-carrying oral surgeons was diagnosed with B-forms: 7 were HBsAg-negative and 6 were the same as the physician. This spread is beyond doubt, but what is important is its frequency. Williams et al. Reported that 237 patients treated by two dentists during the incubation period (6 weeks before disease) of HBsAg-positive hepatitis were treated