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The identification of specific genomic sequences of GB viruses (GBV) has made it possible to utilize the polymerase chain reaction (PCR) for evaluation of the viraemia. Several studies have demonstrated the RNA-GBV presence in sera from different patients amplifying several portions of the virus. In this investigation the PCR results when different regions of GBV (NS3, UTR and putative CORE and E1) were amplified in the same sample. In 245 samples studied there were two (0.8%) discordant results and the NS3 primer showed the greatest sensitivity. The lowest percentage of positivity was obtained with CORE-E1 primers. These results could be because the nucleocapside/E1 region was extremely variable in length and sequences, although degenerated primers and probes were used. Discordances were attributable to laboratory errors, variability in the viral genome, the presence of primer inhibitors in samples or a low viral load.
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April 1990,
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E Quirós, and
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Microbiology and immunology,
