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Article Abstract
Largemouth bass virus (LMBV) and infectious spleen and kidney necrosis virus (ISKNV) are both belong to Iridoviridae that cause considerable economic losses in the fish industry. There is no reported literature that can detect these two viruses simultaneously. In this study, we established a multiplex quantitative polymerase chain reaction (qPCR) assay that can specifically and simultaneously detect both LMBV and ISKNV in fish samples. The specificity experiment showed that the method only amplified LMBV and ISKNV but not the other 10 common fish viruses. The slope (m), efficiency (E) and linearity (R) determined from the generated standard curve were all within the optimal range of qPCR values. The detection limit of the multiplex qPCR assay was as low as 4 copies/μL for LMBV DNA and 7 copies/μL for ISKNV DNA, respectively. The established method exhibited adequate repeatability and reproducibility, and the intra- and inter-assay coefficients of variation were both less than 3 %. The accuracy of the multiplex qPCR method was validated using 229 fish samples and was more precise than that of the conventional PCR assay. In summary, the established multiplex qPCR assay can simultaneously detect LMBV and ISKNV to monitor the risk of infection LMBV and ISKNV and control the disease early.
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| http://dx.doi.org/10.1016/j.jviromet.2024.115012 | DOI Listing |
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