The quadruplex fluorescent quantitative PCR method for the simultaneous detection of respiratory diseases in quail: Pasteurella multocida, Avibacterium paragallinarum, Mycoplasma gallisepticum, and Mycoplasma synoviae

文献类型： 外文期刊

第一作者： Wang, Haojie

作者： Wang, Haojie;Xue, Lihong;Wang, Longxi;Liu, Yixuan;Chen, Jianxing;Sun, Yue;An, Tongqing;Li, Changwen;Chen, Hongyan;Xia, Changyou;Zhang, He;Yu, Changqing

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关键词： Pasteurella multocida; Avibacterium paragallinarum; Mycoplasma gallisepticum; Mycoplasma synoviae; quadruplex fluorescent

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：4.5； 五年影响因子：5.2 ）

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年卷期： 2025 年 16 卷

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收录情况： SCI

摘要： Background The quail farming industry constitutes an important component of China's agricultural sector. However, it is frequently threatened by various bacterial and mycoplasmal infections, particularly respiratory diseases caused by Pasteurella multocida, Avibacterium paragallinarum, Mycoplasma gallisepticum, and Mycoplasma synoviae. These pathogens commonly result in co-infections or secondary infections, and their clinical presentations are often indistinguishable due to the similarity of symptoms.Methods Four sets of primers and probes were designed based on the GenBank-registered gene sequences: the kmt1 gene of P. multocida, the recN gene of A. paragallinarum, the mgc2 gene of M. gallisepticum, and the vlhA gene of M. synoviae. Reaction conditions were optimized accordingly. A recombinant plasmid standard was constructed for the generation of standard curves. The sensitivity, specificity, reproducibility, and accuracy of the assay were systematically evaluated.Results The constructed standard curves demonstrated strong linearity (R2 = 1.000, 0.998, 1.000, and 1.000), with high amplification efficiencies (107.09, 91.23, 112.10, and 125.51%, respectively). The detection limit for each recombinant plasmid standard was as low as 10 copies. No cross-reactivity was observed with non-target pathogens, including avian pox virus, Escherichia coli, Salmonella spp., Newcastle disease virus, infectious bronchitis virus, infectious laryngotracheitis virus, and Staphylococcus aureus. The assay exhibited excellent reproducibility, with inter- and intra-assay coefficient of variation (CV) values ranging from 0.11 to 1.41%. Among 126 clinical samples, P. multocida was detected in 6 samples, A. paragallinarum in 3, M. gallisepticum in 6, and M. synoviae in 4. These results were consistent with those obtained using previously established methods.Discussion A highly sensitive, specific, rapid, and efficient quadruplex fluorescence quantitative PCR assay was successfully developed for the simultaneous detection and identification of Pasteurella multocida, Avibacterium paragallinarum, Mycoplasma gallisepticum, and Mycoplasma synoviae.

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