期刊
JOURNAL OF MEDICAL VIROLOGY
卷 81, 期 1, 页码 90-98出版社
WILEY
DOI: 10.1002/jmv.21334
关键词
cytomegalovirus; Epstein Barr virus; real-time PCR; viral loads
类别
Two quantitative duplex real-time PCR assays were developed for co-amplification of human albumin and cytomegalovirus (CMV) or Epstein Barr virus (EBV) genes after automated extraction on whole blood, and compared two units for expressing viral DNA loads (copies per ml of blood or per 106 peripheral blood leukocytes (PBLs)) on 1,138 positive samples. Both PCRs were characterized by high sensitivity, reproducibility, and linear range. Automated extraction by a MagNA Pure LC Instrument was shown to be more efficient when peripheral blood cell count was inferior to 5 x 10(9) PBLs/L. Albumin co-amplification allows the detection of PCR inhibitors and normalization of viral load according to the number of cells calculated in the sample. The two ways of expressing viral load results were highly correlated, but quantitative differences varied in relation to variations of blood cell count. As these two viruses are highly cell associated, viral loads can be underestimated in patients with leucopenia. In the setting of pre-emptive strategies during CMV infection, the units in which results are expressed can influence clinical management, as illustrated in this article. J. Med. Virol. 81:90-98, 2009. (c) 2008 Wiley-Liss, Inc.
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