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Detection and differentiation of fowl adenovirus serotype 4 and duck adenovirus 3 using high resolution melting curve assay

文献类型： 外文期刊

作者： Chen, Shuyu 1 ; Chen, Cuiteng 1 ; Zhang, Mengyan 1 ; Chen, Yuyi 1 ; Zhang, Wenyu 1 ; Fu, Huanru 1 ; Huang, Yu 1 ; Cheng, Longfei 1 ; Wan, Chunhe 1 ;

作者机构： 1.Fujian Acad Agr Sci, Inst Anim Husb & Vet Med, Fujian Anim Dis Control Technol Dev Ctr, Fujian Key Lab Avian Dis Control & Prevent, Fuzhou 350013, Peoples R China

2.Fujian Agr & Forestry Univ, Sch Life Sci, Fuzhou 350002, Peoples R China

3.Fujian Agr & Forestry Univ, Coll Anim Sci, Fuzhou 350002, Peoples R China

关键词： FAdV-4; DAdV-3; qPCR-HRM assay; Differentiation; Epidemiological investigation

期刊名称：POULTRY SCIENCE （ 影响因子：4.2； 五年影响因子：4.5 ）

ISSN： 0032-5791

年卷期： 2024 年 103 卷 12 期

页码：

收录情况： SCI

摘要： Fowl adenovirus type 4 (FAdV-4) and duck adenovirus type 3 (DAdV-3) are the causative agents of clinical diseases in poultry and have caused considerable economic losses to the waterfowl industry in China. Both FAdV4 and DAdV-3 are classified into the genus Aviadenovirus under the family Adenoviridae. The high-resolution melting (HRM) assay has become a useful method for virus genotyping, which offers the possibility of rapidly developing a differentiation technique in which the melting profile depends on the GC content of the product in the qPCR platform. The aim of this study was to develop a qPCR-HRM assay for sensitive FAdV-4 and DAdV-3 detection and differentiation. Here, specific primers were designed on the basis of the 100 K genes of FAdV-4 and DAdV-3, and a qPCR-HRM assay was established through optimization of the reaction conditions. A specificity test revealed that this method could detect only FAdV-4 and DAdV-3, with no cross-reaction with other common duck-derived viruses. A sensitivity test revealed that the lowest detection limits of FAdV-4 and DAdV-3 were 2.84 copies/mu L and 2.85 copies/mu L, respectively. A repeatability test demonstrated that the coefficient of variation was less than 2.5 % in both the intragroup and the intergroup analyses. Field sample distributions of FAdV-4 and DAdV-3 were investigated, and the percentages of DAdV-3-positive, FAdV-4-positive and coinfection-positive in Muscovy ducks were 27.78 %, 16.67 % and 11.11 %, respectively. Further studies are needed to provide more insight into the pathogenesis of FAdV-4 and DAdV-3 coinfection in ducks. In conclusion, the qPCR-HRM assay provides an accurate, sensitive, reliable and cost-effective alternative method for detecting and distinguishing FAdV-4 and DAdV-3.

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