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本文对目前部分市售的ＨＢＶＰＣＲ试剂进行了灵敏度和检测率的测定，并在检测ＨＢＶ低水平感染中，用ＰＣＲ和斑点杂交作了比较。结果不同公司试剂盒的ＨＢＶ－ＤＮＡ最低检测浓度从０．１ｆｇ到１ｐｇ不等，同一公司不同批号的ＨＢＶ－ＤＮＡ最低检测浓度也从１００ｆｇ到１００ａｇ不同，差达１０３～１０４倍。ＰＣＲ和斑点杂交在三组不同乙肝标志组中的阳性检测率为ＨＢｓＡｇ（＋）ＨＢｅＡｇ（－）抗ＨＢｅ（－）组：ＰＣＲ７０％，斑点杂交４６．４％；ＨＢｓＡｇ（＋）ＨＢｅＡｇ（－）抗ＨＢｓ（＋）组：ＰＣＲ３５．７％，斑点杂交２．９％；ＨＢｓＡｇ（－）抗ＨＢｅ（＋）抗ＨＢｓ（＋）／ＨＢｃ（＋）组：ＰＣＲ１６．６％，斑点杂交３．３％。三组检测率均Ｐ＜０．０１。因此，目前市售的ＨＢＶＰＣＲ试剂必须标化，ＰＣＲ更适合于检测ＨＢＶ低水平的感染
In this paper, some commercially available HBVPCR reagents were tested for sensitivity and detection rate, and PCR and dot blot were used to detect low level HBV infection. Results The lowest detection concentration of HBV-DNA in different kits ranged from 0.1fg to 1pg. The lowest concentration of HBV-DNA in different batches of the same company varied from 100fg to 100ag, with a difference of 103 to 104 times. The positive detection rate of HBsAg (+) HBeAg (-) anti-HBe (-) group by PCR and dot blot in three groups of different hepatitis B markers: PCR70%, 46.4% HBsAg (-) anti-HBe (+) anti-HBs (+) / HBc (+) group: PCR16.6%, dot blot hybridization 3.3 %. The detection rates of three groups were all P <0.01. Therefore, the currently marketed HBV PCR reagents must be standardized, and PCR is more suitable for the detection of low-level HBV infection