Duplex PCR Assay for Simultaneous Detections of Staphylococcus aureus and Bordetella bronchiseptica in Rabbits
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摘要: 为建立同时检测兔金黄色葡萄球菌和支气管败血波氏杆菌的双重PCR检测方法,本研究根据金黄色葡萄球菌的nuc基因和支气管败血波氏杆菌的fimN基因的保守序列设计2对特异性引物,通过优化反应条件,成功建立兔金黄色葡萄球菌和支气管败血波氏杆菌双重PCR检测方法。该方法对兔多杀性巴氏杆菌、大肠杆菌和魏氏梭菌的检测结果为阴性;能够检出5 pg的金黄色葡萄球菌和支气管败血波氏杆菌的基因组DNA;与单重PCR检测方法的符合率为100%。说明本试验建立的双重PCR检测方法具有良好的特异性、敏感性和准确性,为兔金黄色葡萄球菌和支气管败血波氏杆菌的鉴别诊断提供了有效的技术手段。Abstract: To develop a duplex PCR assay for simultaneous detections of Staphylococcus aureus and Bordetella bronchiseptica in rabbits, two pairs of specific primers were designed based on the conserved regions of nuc and fimN genes of the pathogens. The methodology with optimized reaction conditions was specific and free of cross-reactions with Pasteurella multocida, Escherichia coli and Clostridieum welchii. The detection limit of the method was 5 pg genome DNA on both pathogens. Moreover, the results obtained by using the duplex PCR assay were in perfect agreement with those determined separately by single PCR determinations. Thus, the newly developed highly specific, sensitive and accurate methodology could be a rapid assay applied for simultaneous identification of S. aureus and B. bronchiseptica present in a diseased rabbit.
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Key words:
- rabbit /
- Staphylococcus aureus /
- Bordetella bronchiseptica /
- duplex PCR assay
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表 1 双重PCR引物
Table 1. Primers used for duplex PCR assay
病原 靶基因 引物序列(5′-3′) 参考序列登录号 产物大小/bp 金黄色葡萄球菌 nuc F:ttggttgatacacctgaaacaa;R:cgttgtcttcgctccaaata DQ399678 322 支气管败血波氏杆菌 fimN F:gtgatcaccggcaacatc;R:tgcctgtggctttcttca AF231910 478 表 2 临床样品检测结果
Table 2. Pathogen detection of duplex PCR assay on clinic samples
样品 已知结果/份 双重PCR方法鉴定结果/份 符合率/% 金黄色葡萄球菌 20 20 100 支气管败血波氏杆菌 24 24 100 混合感染 14 14 100 阴性 5 5 100 总计 63 63 100 -
[1] 王孝友, 王永康, 杨睿, 等.兔葡萄球菌的分离与鉴定[J].中国养兔, 2011(4):12-14. doi: 10.3969/j.issn.1005-6327.2011.04.004 [2] PATHAK A K, BOAG B, POSS M, et al. Seasonal breeding drives the incidence of a chronic bacterial infection in a free-living herbivore population[J]. Epidemiol infect, 2011, 139(8):2110-1219. http://europepmc.org/abstract/MED/20943004 [3] 张亚黎, 孙志强.家兔葡萄球菌病的初步诊断及防治[J].畜牧兽医杂志, 2015, 34(1):132-134. doi: 10.3969/j.issn.1004-6704.2015.01.058 [4] 姜常青, 赵永峰, 刁非非, 等.兔源金黄色葡萄球菌的分离鉴定[J].山东畜牧兽医, 2015, 36(9):10-11. doi: 10.3969/j.issn.1007-1733.2015.09.005 [5] 刘燕, 韦强, 肖琛闻, 等.兔波氏杆菌研究进展及防控对策思考[J].中国养兔, 2014(4):36-38. doi: 10.3969/j.issn.1005-6327.2014.04.010 [6] 王晓芳, 刘燕, 肖琛闻, 等.兔支气管败血波氏杆菌的分离鉴定与耐药基因检测[J].中国畜牧兽医, 2015, 42(3):544-548. http://www.cnki.com.cn/Article/CJFDTOTAL-GWXK201503006.htm [7] 刘燕, 章春桃, 韦强, 等.兔波氏杆菌fimN蛋白间接ELISA抗体检测方法的建立[J].中国预防兽医学报, 2013, 35(11):899-902. doi: 10.3969/j.issn.1008-0589.2013.11.09 [8] 马超锋, 陈铭, 徐永杰. PCR检测兔支气管败血波氏杆菌方法的建立及应用[J].河南农业科学, 2017, 46(4):124-127. http://d.old.wanfangdata.com.cn/Periodical/hnnykx201704025 [9] 邓钊宾, 余滔, 耿毅, 等.兔源金黄色葡萄球菌的耐药性及耐药基因分析[J].中国预防兽医学报, 2016, 38(1):45-48. doi: 10.3969/j.issn.1008-0589.2016.01.11 [10] BRAKSTAD O G, AASBAKK K, MAELAND J A. Detection of Staphylococcus aureus by polymerase chain reaction amplification of the nuc gene[J]. J Clin Microbiol, 1992, 30(7):1654-1660. http://d.old.wanfangdata.com.cn/OAPaper/oai_pubmedcentral.nih.gov_265359 [11] 向正刚, 耿毅, 张雨薇, 等.四川兔源金黄色葡萄球菌毒力检测及分子分型[J].华南农业大学学报, 2017, 38(4):62-68. http://d.old.wanfangdata.com.cn/Periodical/hnnydxxb201704011 [12] 刘燕, 章春桃, 韦强, 等.兔支气管败血波氏杆菌PCR快速检测方法的建立及应用[J].中国养兔, 2012(4):13-15. doi: 10.3969/j.issn.1005-6327.2012.04.003 [13] 章春桃, 刘燕, 韦强, 等.兔支气管败血波氏杆菌fimN基因的原核表达[J].浙江农业学报, 2011, 23(5):890-893. doi: 10.3969/j.issn.1004-1524.2011.05.006 [14] 凤晓博, 赵青, 林童.食品中金黄色葡萄球菌PCR检测方法的建立[J].青海畜牧兽医杂志, 2014, 44(5):15-16. doi: 10.3969/j.issn.1003-7950.2014.05.009