Article(id=1307008243809669550, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307007396681900041, articleNumber=null, orderNo=null, doi=10.11843/j.issn.0366-6964.2026.01.032, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1737475200000, receivedDateStr=2025-01-22, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1789544648363, onlineDateStr=2026-09-16, pubDate=1769097600000, pubDateStr=2026-01-23, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789544648363, onlineIssueDateStr=2026-09-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789544648363, creator=13701087609, updateTime=1789544648363, updator=13701087609, issue=Issue{id=1307007396681900041, tenantId=1146029695717560320, journalId=1306274286668972124, year='2026', volume='57', issue='1', pageStart='1', pageEnd='568', issueExtLink='null', onlineDate='null', pubDate='1769097600000', pubDateStr='2026-01-23', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789544446392, creator='13701087609', updateTime=1789609890784, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1307281890638057732, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307007396681900041, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1307281890738721029, tenantId=1146029695717560320, journalId=1306274286668972124, issueId=1307007396681900041, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=369, endPage=377, ext={EN=ArticleExt(id=1307008245919404466, articleId=1307008243809669550, tenantId=1146029695717560320, journalId=1306274286668972124, language=EN, title=Establishment and Preliminary Application of a Duplex TaqMan Real-time PCR Assay for Brucella, columnId=1307007432299930010, journalTitle=Acta Veterinaria et Zootechnica Sinica, columnName=PREVENTIVE VETERINARY MEDICINE, runingTitle=null, highlight=null, articleAbstract=

This study aimed to establish a cost-effective duplex TaqMan real-time quantitative PCR (qPCR) assay for the rapid detection of Brucella infection in animals and animal products, and to differentiate B.abortus from other Brucella species. This method provides a scientifically valid diagnostic tool for distinguishing currently used vaccine strains and novel vaccines under development. Specific primers and TaqMan probes targeting the galU and Omp31 genes were designed based on GenBank sequences. Recombinant plasmids were constructed. The assay's specificity, sensitivity, and repeatability were rigorously evaluated. Clinical serum and tissue samples from animals with brucellosis were tested. A duplex TaqMan qPCR assay for Brucella detection was successfully developed. The limit of detection (LOD) for recombinant plasmid standards was 1.93×100copies·μL-1. The assay exhibited no cross-reactivity with other Gram-negative bacteria. Both intra-assay and inter-assay reproducibility were excellent, with coefficients of variation (CV) consistently below 2%. Testing of 156 samples (including laboratory-prepared and clinical specimens) revealed a positive agreement rate of 69.75% compared to BCSP31-PCR. Furthermore, the duplex TaqMan qPCR demonstrated significantly higher sensitivity (100%) than conventional PCR (69.75%) and the RBPT (58.65%). The established duplex TaqMan qPCR assay provides a robust technical foundation for the clinical differential diagnosis, epidemiological surveillance, and eradication programs of brucellosis.

, authors=Haitao PENG, Yang GAO, Yuxin LIU, Deyuan GU, Dong ZHANG, Ru ZHANG, Huihui XU, Si CHEN, Yanling YANG, authorsList=Haitao PENG, Yang GAO, Yuxin LIU, Deyuan GU, Dong ZHANG, Ru ZHANG, Huihui XU, Si CHEN, Yanling YANG, authorCompany=null, correspAuthors=Si CHEN, Yanling YANG, authorNote=null, correspAuthorsNote=
YANG Yanling, E-mail:
CHEN Si, E-mail:
, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1307008251787235772, articleId=1307008243809669550, tenantId=1146029695717560320, journalId=1306274286668972124, language=CN, title=布鲁菌双重TaqMan荧光定量PCR检测方法的建立及初步应用, columnId=1307007432459313564, journalTitle=畜牧兽医学报, columnName=预防兽医, runingTitle=null, highlight=null, articleAbstract=

旨在建立一种经济高效的布鲁菌双重TaqMan荧光定量PCR鉴别检测方法,用于布鲁菌感染的动物及动物产品的快速检测并区分牛种布鲁菌和其他种布鲁菌感染的动物,为临床常的疫苗和研发的新型疫苗提供科学有效的鉴别诊断方法。本研究根据GenBank公布的galU和Omp31的序列设计检测引物和探针,构建重组质粒,对方法特异性、灵敏性及重复性评价,检测实验室制备和临床动物布病血清及组织样品。结果表明,成功建立了布鲁菌双重TaqMan荧光定量PCR检测方法,该方法最低检测限为1.93×100 copies·μL-1,与其他革兰阴性菌无交叉反应,批内及批间变异系数均小于2%。利用本研究建立的方法检测实验室制备样品和临床采集样品共156份,与BCSP31-PCR相比,两者阳性符合率为69.75%;与PCR和虎红凝集试验相比,灵敏性更高,双重TaqMan荧光定量PCR的敏感性为100%,PCR的敏感性为69.75%,虎红凝集试验的敏感性为58.65%。本研究建立的布鲁菌双重TaqMan荧光定量PCR检测方法,为布鲁菌临床鉴别检测、流行病学调查及净化提供技术支持。

, authors=彭海涛, 高阳, 刘雨欣, 顾德媛, 张东, 张如, 许会会, 陈思, 杨艳玲, authorsList=彭海涛, 高阳, 刘雨欣, 顾德媛, 张东, 张如, 许会会, 陈思, 杨艳玲, authorCompany=null, correspAuthors=陈思, 杨艳玲, authorNote=

彭海涛,硕士生,主要从事布鲁菌病诊断试剂研制,E-mail:

, correspAuthorsNote=
杨艳玲,主要从事布鲁菌致病机制研究及新型疫苗创制,E-mail:
陈思,主要从事布鲁菌致病机制研究及新型疫苗创制,E-mail:
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彭海涛,硕士生,主要从事布鲁菌病诊断试剂研制,E-mail:

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language=null, rfNumber=[21], rfOrder=26, authorNames=null, journalName=null, refType=null, unstructuredReference=SAINI S,GUPTA V K,GURURAJ K,et al.Comparative diagnostic evaluation of OMP31 gene based TaqMan® real-time PCR assay with visual LAMP assay and indirect ELISA for caprine brucellosis[J].Trop Anim Health Prod,2017,49(6):1253-1264., articleTitle=null, refAbstract=null), Reference(id=1307286629748600833, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[22], rfOrder=27, authorNames=null, journalName=null, refType=null, unstructuredReference=ARENAS-GAMBOA A M,FICHT T A,KAHL-MCDONAGH M M,et al.The Brucella abortus S19 Δ vjbR live vaccine candidate is safer than S19 and confers protection against wild-type challenge in BALB/c mice when delivered in a sustained-release vehicle[J].Infect Immun,2009,77(2):877-884., articleTitle=null, refAbstract=null), Reference(id=1307286629840875522, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[23], rfOrder=28, authorNames=null, journalName=null, refType=null, unstructuredReference=WALLACH J C,FERRERO M C,VICTORIA DELPINO M,et al.Occupational infection due to Brucella abortus S19 among workers involved in vaccine production in Argentina[J].Clin Microbiol Infect,2008,14(8):805-807., articleTitle=null, refAbstract=null), Reference(id=1307286629912178691, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[24], rfOrder=29, authorNames=null, journalName=null, refType=null, unstructuredReference=OSMAN A E F,HASSAN A N,ALI A E,et al.Brucella melitensis Biovar 1 and Brucella abortus S19 vaccine strain infections in milkers working at cattle farms in the Khartoum Area,Sudan[J].PLoS One,2015,10(5):e0123374., articleTitle=null, refAbstract=null), Reference(id=1307286631174664196, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[25], rfOrder=30, authorNames=null, journalName=null, refType=null, unstructuredReference=LALSIAMTHARA J,LEE J H.Development and trial of vaccines against Brucella[J].J Vet Sci,2017,18(S1):281., articleTitle=null, refAbstract=null)], funds=[Fund(id=1307286627487871970, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, awardId=2023YFD1800703, language=CN, fundingSource=“十四五”国家重点研发计划(2023YFD1800703), fundOrder=null, 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M. DL5000 DNA marker; 1. galU; 2. Omp31; 3. pUC19 linearized vector

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M. DL5000 DNA相对分子质量标准;1. galU;2. Omp31;3. pUC19线性化片段

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Primer and probe

, figureFileSmall=null, figureFileBig=null, tableContent=

基因

Gene

引物和探针

Primer andprobe

序列

Sequence

产物大小/bp

Product size

galUgalU-F5’-GAACGGGGGAAAACCGAAGA-3’149
galU-R5’-AGTGCAAAAGGTTCGTTGCC-3’
galU-PFAM-CAGCAGGTGCCGCTTGGCCTC-BHQ1
P-galU-FAGTTCTAAATGAGTTCTATTCGGAAAATCCGCAAGGCAG917
P-galU-RGACGGCCAGTGAATTTCAGGCTGGCTGGATCGTCTTCAACAG
Omp31Omp31-F5’-TTCCGCCCCTACTGCTGCT-3’138
Omp31-R5’-CCGGAAACCTGTTCGTTGTC-3’
Omp31-PHEX-ACGCCGGTTACGCAGGCGGCAAGTT-BHQ1
P-Omp31-FTCGACTCTAGAGGATATGAAATCCGTAATTTTGGCGTCCATCGCC755
P-Omp31-RAACTCATTTAGAACTTGTAGTTCAGACCGACGCGAACAGT
pUC19pUC19-FATCCTCTAGAGTCGACCTGCAGGCA2 698
pUC19-RAATTCACTGGCCGTCGTTTTACAACGT
), ArticleFig(id=1307286625025815513, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, language=CN, label=表1, caption=

引物和探针序列

, figureFileSmall=null, figureFileBig=null, tableContent=

基因

Gene

引物和探针

Primer andprobe

序列

Sequence

产物大小/bp

Product size

galUgalU-F5’-GAACGGGGGAAAACCGAAGA-3’149
galU-R5’-AGTGCAAAAGGTTCGTTGCC-3’
galU-PFAM-CAGCAGGTGCCGCTTGGCCTC-BHQ1
P-galU-FAGTTCTAAATGAGTTCTATTCGGAAAATCCGCAAGGCAG917
P-galU-RGACGGCCAGTGAATTTCAGGCTGGCTGGATCGTCTTCAACAG
Omp31Omp31-F5’-TTCCGCCCCTACTGCTGCT-3’138
Omp31-R5’-CCGGAAACCTGTTCGTTGTC-3’
Omp31-PHEX-ACGCCGGTTACGCAGGCGGCAAGTT-BHQ1
P-Omp31-FTCGACTCTAGAGGATATGAAATCCGTAATTTTGGCGTCCATCGCC755
P-Omp31-RAACTCATTTAGAACTTGTAGTTCAGACCGACGCGAACAGT
pUC19pUC19-FATCCTCTAGAGTCGACCTGCAGGCA2 698
pUC19-RAATTCACTGGCCGTCGTTTTACAACGT
), ArticleFig(id=1307286625092924378, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, language=EN, label=Table 2, caption=

Primer and probe concentration optimization of duplex TaqMan qPCR (Ct value, x±s)

, figureFileSmall=null, figureFileBig=null, tableContent=

探针浓度/(nmol·L-1)

Probe concentration

引物

Primer

引物浓度/(nmol·L-1) Primer concentration
500250125
250Ct(galU)20.20±0.1320.50±0.1722.40±0.18
Ct(Omp31)22.20±0.2222.50±0.1722.90±0.18
125Ct(galU)19.80±0.0820.90±0.1122.50±0.12
Ct(Omp31)21.80±0.1521.90±0.1222.30±0.16
62.5Ct(galU)22.00±0.1321.80±0.1620.90±0.10
Ct(Omp31)21.80±0.2021.80±0.2122.20±0.14
), ArticleFig(id=1307286625151644635, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, language=CN, label=表2, caption=

双重TaqMan荧光定量PCR方法的引物探针浓度优化及结果(Ct值,x±s)

, figureFileSmall=null, figureFileBig=null, tableContent=

探针浓度/(nmol·L-1)

Probe concentration

引物

Primer

引物浓度/(nmol·L-1) Primer concentration
500250125
250Ct(galU)20.20±0.1320.50±0.1722.40±0.18
Ct(Omp31)22.20±0.2222.50±0.1722.90±0.18
125Ct(galU)19.80±0.0820.90±0.1122.50±0.12
Ct(Omp31)21.80±0.1521.90±0.1222.30±0.16
62.5Ct(galU)22.00±0.1321.80±0.1620.90±0.10
Ct(Omp31)21.80±0.2021.80±0.2122.20±0.14
), ArticleFig(id=1307286625222947804, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, language=EN, label=Table 3, caption=

Universality sample test results

, figureFileSmall=null, figureFileBig=null, tableContent=

样品类型

Sample type

双重qPCR检测结果

Duplex real-time PCR test results

PCR检测结果

PCR test results

虎红平板凝集试验

Rose Bengal plate test

galUOmp31

鹿血清

Cervine serum

47/5246/5246/5214/52

羊脾脏

Sheep spleen

15/1515/159/15—
), ArticleFig(id=1307286625432663005, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, language=CN, label=表3, caption=

通用型样品检测结果

, figureFileSmall=null, figureFileBig=null, tableContent=

样品类型

Sample type

双重qPCR检测结果

Duplex real-time PCR test results

PCR检测结果

PCR test results

虎红平板凝集试验

Rose Bengal plate test

galUOmp31

鹿血清

Cervine serum

47/5246/5246/5214/52

羊脾脏

Sheep spleen

15/1515/159/15—
), ArticleFig(id=1307286627135550430, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, language=EN, label=Table 4, caption=

Results of differential diagnosis for sera from animals immunized with galU-deficient Brucella attenuated vaccine, bacterial ghost vaccine, and infected with Brucella melitensis

, figureFileSmall=null, figureFileBig=null, tableContent=

样品类型

Sample type

双重qPCR检测结果

Duplex real-time PCR test results

PCR检测结果

PCR test results

虎红平板凝集试验

Rose Bengal plate test

galUOmp31

免疫菌影疫苗羊血清

Serum of Sheep immunized with BG

0/160/160/160/16

羊种布鲁菌感染羊血清

Serum from Brucella melitensis-infected sheep

21/2121/2113/2121/21

布病阴性羊血清

Sheep serum negative for Brucella antibody

0/80/80/80/8

免疫gaIU基因缺失弱毒疫苗豚鼠血清

Serum of guinea pig with galU deficient Brucella

0/99/95/95/9

羊种布鲁菌感染豚鼠血清

Serum from Brucella melitensis-infected guinea pig

5/55/55/55/5
), ArticleFig(id=1307286627211047903, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, language=CN, label=表4, caption=

galU基因缺失布鲁菌弱毒疫苗免疫、菌影疫苗免疫和羊种布鲁菌感染动物血清的鉴别诊断结果

, figureFileSmall=null, figureFileBig=null, tableContent=

样品类型

Sample type

双重qPCR检测结果

Duplex real-time PCR test results

PCR检测结果

PCR test results

虎红平板凝集试验

Rose Bengal plate test

galUOmp31

免疫菌影疫苗羊血清

Serum of Sheep immunized with BG

0/160/160/160/16

羊种布鲁菌感染羊血清

Serum from Brucella melitensis-infected sheep

21/2121/2113/2121/21

布病阴性羊血清

Sheep serum negative for Brucella antibody

0/80/80/80/8

免疫gaIU基因缺失弱毒疫苗豚鼠血清

Serum of guinea pig with galU deficient Brucella

0/99/95/95/9

羊种布鲁菌感染豚鼠血清

Serum from Brucella melitensis-infected guinea pig

5/55/55/55/5
), ArticleFig(id=1307286627278156768, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, language=EN, label=Table 5, caption=

Results of differential diagnosis for sera from cows immunized with Brucella abortus A19 vaccine

, figureFileSmall=null, figureFileBig=null, tableContent=

样品类型

Sample type

双重qPCR检测结果

Duplex real-time PCR test results

PCR检测结果

PCR test results

虎红平板凝集试验

Rose Bengal plate test

galUOmp31

牛血清

Bovine serum

22/300/3014/3016/30
), ArticleFig(id=1307286627332682721, tenantId=1146029695717560320, journalId=1306274286668972124, articleId=1307008243809669550, language=CN, label=表5, caption=

牛种布鲁菌A19疫苗免疫奶牛血清的鉴别诊断结果

, figureFileSmall=null, figureFileBig=null, tableContent=

样品类型

Sample type

双重qPCR检测结果

Duplex real-time PCR test results

PCR检测结果

PCR test results

虎红平板凝集试验

Rose Bengal plate test

galUOmp31

牛血清

Bovine serum

22/300/3014/3016/30
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布鲁菌双重TaqMan荧光定量PCR检测方法的建立及初步应用
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彭海涛 , 高阳 , 刘雨欣 , 顾德媛 , 张东 , 张如 , 许会会 , 陈思 , 杨艳玲
畜牧兽医学报 | 预防兽医 2026,57(1): 369-377
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畜牧兽医学报 |预防兽医 2026 , 57 (1) : 369 -377
布鲁菌双重TaqMan荧光定量PCR检测方法的建立及初步应用
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彭海涛 , 高阳, 刘雨欣, 顾德媛, 张东, 张如, 许会会, 陈思 , 杨艳玲
作者信息
  • 中国农业科学院特产研究所,长春 130000
通讯作者:
杨艳玲,主要从事布鲁菌致病机制研究及新型疫苗创制,E-mail:
陈思,主要从事布鲁菌致病机制研究及新型疫苗创制,E-mail:
作者简介:

彭海涛,硕士生,主要从事布鲁菌病诊断试剂研制,E-mail:

Establishment and Preliminary Application of a Duplex TaqMan Real-time PCR Assay for Brucella
Haitao PENG , Yang GAO, Yuxin LIU, Deyuan GU, Dong ZHANG, Ru ZHANG, Huihui XU, Si CHEN , Yanling YANG
Affiliations
  • Institute of Special Animal and Plant Sciences,Chinese Academy of Agricultural Sciences,Changchun 130000,China
  • Corresponding Author:
    YANG Yanling, E-mail:
    CHEN Si, E-mail:
出版时间: 2026-01-23 doi: 10.11843/j.issn.0366-6964.2026.01.032
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旨在建立一种经济高效的布鲁菌双重TaqMan荧光定量PCR鉴别检测方法,用于布鲁菌感染的动物及动物产品的快速检测并区分牛种布鲁菌和其他种布鲁菌感染的动物,为临床常的疫苗和研发的新型疫苗提供科学有效的鉴别诊断方法。本研究根据GenBank公布的galU和Omp31的序列设计检测引物和探针,构建重组质粒,对方法特异性、灵敏性及重复性评价,检测实验室制备和临床动物布病血清及组织样品。结果表明,成功建立了布鲁菌双重TaqMan荧光定量PCR检测方法,该方法最低检测限为1.93×100 copies·μL-1,与其他革兰阴性菌无交叉反应,批内及批间变异系数均小于2%。利用本研究建立的方法检测实验室制备样品和临床采集样品共156份,与BCSP31-PCR相比,两者阳性符合率为69.75%;与PCR和虎红凝集试验相比,灵敏性更高,双重TaqMan荧光定量PCR的敏感性为100%,PCR的敏感性为69.75%,虎红凝集试验的敏感性为58.65%。本研究建立的布鲁菌双重TaqMan荧光定量PCR检测方法,为布鲁菌临床鉴别检测、流行病学调查及净化提供技术支持。

布鲁菌  /  双重Taq Man荧光定量PCR  /  检测方法  /  鉴别诊断

This study aimed to establish a cost-effective duplex TaqMan real-time quantitative PCR (qPCR) assay for the rapid detection of Brucella infection in animals and animal products, and to differentiate B.abortus from other Brucella species. This method provides a scientifically valid diagnostic tool for distinguishing currently used vaccine strains and novel vaccines under development. Specific primers and TaqMan probes targeting the galU and Omp31 genes were designed based on GenBank sequences. Recombinant plasmids were constructed. The assay's specificity, sensitivity, and repeatability were rigorously evaluated. Clinical serum and tissue samples from animals with brucellosis were tested. A duplex TaqMan qPCR assay for Brucella detection was successfully developed. The limit of detection (LOD) for recombinant plasmid standards was 1.93×100copies·μL-1. The assay exhibited no cross-reactivity with other Gram-negative bacteria. Both intra-assay and inter-assay reproducibility were excellent, with coefficients of variation (CV) consistently below 2%. Testing of 156 samples (including laboratory-prepared and clinical specimens) revealed a positive agreement rate of 69.75% compared to BCSP31-PCR. Furthermore, the duplex TaqMan qPCR demonstrated significantly higher sensitivity (100%) than conventional PCR (69.75%) and the RBPT (58.65%). The established duplex TaqMan qPCR assay provides a robust technical foundation for the clinical differential diagnosis, epidemiological surveillance, and eradication programs of brucellosis.

Brucella  /  duplex TaqMan real-time PCR  /  detection method  /  differential diagnosis
彭海涛, 高阳, 刘雨欣, 顾德媛, 张东, 张如, 许会会, 陈思, 杨艳玲. 布鲁菌双重TaqMan荧光定量PCR检测方法的建立及初步应用. 畜牧兽医学报, 2026 , 57 (1) : 369 -377 . DOI: 10.11843/j.issn.0366-6964.2026.01.032
Haitao PENG, Yang GAO, Yuxin LIU, Deyuan GU, Dong ZHANG, Ru ZHANG, Huihui XU, Si CHEN, Yanling YANG. Establishment and Preliminary Application of a Duplex TaqMan Real-time PCR Assay for Brucella[J]. Acta Veterinaria et Zootechnica Sinica, 2026 , 57 (1) : 369 -377 . DOI: 10.11843/j.issn.0366-6964.2026.01.032
布鲁菌病(简称布病)是由布鲁菌感染引起的一种流行广泛、危害较大的人兽共患病之一[1]。长期以来布病给畜牧业经济带来不可估量的损失,同时给畜产品安全和国家生物安全带来了严重隐患。最近研究发现布鲁菌已有12个种,34个生物型[2],其中以羊种、牛种布鲁菌对人畜危害最为严重。动物感染后可引起流产、睾丸炎、关节炎等繁殖系统障碍为主的临床症状,人感染多由动物传播,主要以发热、不孕不育、关节炎、脊柱炎、心肌炎等为典型的临床症状[3]。全世界16%~25%的人口受该病威胁,据统计全球人类发病已超过210万例,每年因该病造成的经济损失达30亿~40亿美元[4⁃7]。实施动物布病净化是全球防控布病的重要路径,也是布病防控的终极目标,美国、加拿大、澳大利亚等国均采取有效的净化措施彻底消灭了动物布病。然而,布病的精准检测是我国动物布病净化急需解决的关键核心技术需求,在我国现有的布病诊断技术中,多基于血清学方法,如试管凝集试验(SAT)、虎红平板凝集试验(RBT)、酶联免疫吸附试验(ELISA)、补体结合试验(CFT)、胶体金快速检测试纸等。血清学检测是人畜布病检测常用的诊断方法,但血清学检测方法因特异性、灵敏性、应用范围等局限,目前还无法作出准确的判断,且无法鉴别诊断。病原学检测是布病诊断的关键方法,尤其是细菌分离是布病诊断的“金标准”[8]。但细菌分离需要BSL-3实验室条件,难以实现。因此,需要一种建立一种更灵敏、更方便的布鲁菌病原学检测方法克服以细菌培养和抗原抗体结合为基础的检测方法的局限性。同时病原学与血清学检测方法联合应用将极大提高动物布病检测的精准性,是动物布病净化急需的检测方法。
与血清学检测比较,分子生物学诊断技术因其特异性强、灵敏度高等特点而被广泛应用于病原体感染检测中。随着分子生物学的发展,基于PCR的病原学检测技术也被广泛用于动物布病的诊断,如基于BCSP31基因的PCR检测方法,不但可以精确诊断人畜布病,同时还可检测动物产品及环境污染样品。实时荧光定量PCR(real-time fluorescent quantitative PCR,qPCR)技术是在PCR定性技术基础上发展起来的核酸定量技术,是一种已广泛应用于核酸检测和定量的方法。TaqMan荧光定量PCR方法是基于使用特异的引物和探针,结合到目标DNA序列,并在扩增过程中将探针切断产生荧光信号。相较染料法荧光定量PCR,特异性更强。
在先前的研究中发现galU是布鲁菌高度保守的毒力基因,缺失该基因后可用于制备新型布病疫苗,为此,该基因不但是理想的布鲁菌病原检测核酸靶标,同时也是区分galU缺失疫苗株的鉴别诊断标识;外膜蛋白31基因(Omp31)部分序列在牛种布鲁菌基因永久缺失,可用于区分牛种布鲁菌和其他种布鲁菌[9⁃11]。
鉴于现有动物布病疫苗均为弱毒疫苗,尤其是由牛种布鲁菌制备的弱毒疫苗A19在奶牛、肉牛中广泛应用,疫苗引起的流产及感染人等不良反应在奶牛和肉牛中时有发生,尚无有效的方法进行区分,给产业带来了严重的影响。为此,本研究以galU和Omp31的核酸序列构建全长片段的重组质粒,建立灵敏度高、特异性强、经济实用的布鲁菌TaqMan荧光定量PCR检测方法,用于动物及动物产品布鲁菌检测及现有动物布病弱毒疫苗和未来新型疫苗的鉴别诊断,结合现有的血清学检测方法为我国动物布病净化提供科学精准高效的检测技术。
布鲁菌核酸在广州医科大学附属市八医院广州市高致病性传染病临床检测生物安全三级实验室提取并通过无菌检验后保存于本实验室,其它细菌核酸由本实验室保存。
TIANGEN®TIANprep Mini Plasmid Kit质粒提取试剂盒、TIANGEN®TIANgel Purification Kit琼脂糖凝胶DNA回收试剂盒、SuperReal荧光定量预混试剂,北京天根生化科技有限公司;Vazyme®ClonExpress MultiS One Step Cloning Kit无缝克隆试剂盒、Vazyme®XL10化学感受态细胞、Vazyme®2 x Phanta Max Master Mix高保真酶预混液,诺唯赞生物医药科技有限公司;引物和探针,上海生工生物工程技术服务有限公司合成。
QuantStudio 3实时荧光定量PCR系统,NanoDrop微量分光光度计,干式加热器赛默飞世尔公司产品;FIRE READER XSD-56-20M型凝胶成像系统,Uvitec公司产品;恒温培养箱,上海三腾仪器有限公司;SCI1000-G梯度PCR仪,赛洛捷克公司产品。
依据GenBank查找羊种布鲁菌galU、Omp31基因参考序列和pUC19质粒参考序列图谱,利用NCBI primer-BLAST软件,设计三对携同源臂引物及两对特异性引物和探针(表1);将双重TaqMan荧光定量PCR引物galU-F/R和Omp31-F/R序列输入NCBI primer-BLAST软件;galU-F/R引物检索条件为无物种限制核酸序列数据库(Nucleotide Sequence Database, nt),Omp31-F/R引物检索条件为无物种限制核酸序列数据库和Brucella abortus核酸序列数据库,验证galU-F/R引物作为布鲁菌通用性检测以及Omp31-F/R引物作为牛种布鲁菌鉴别检测的可用性,并由上海生工生物科技有限公司合成。
以羊种布鲁菌核酸序列为模板,分别扩增galU、Omp31基因以及反向PCR扩增pUC19质粒序列。分别将扩增产物进行琼脂糖凝胶电泳分离,并回收琼脂糖凝胶目标片段核酸,通过无缝克隆将galU及Omp31序列插入pUC19质粒,转化至XL10感受态细胞,在氨苄青霉素LB固体培养基上过夜培养,挑取单菌落PCR鉴定后转至LB液体培养基扩大培养,菌液提取质粒后送上海生工生物科技有限公司测序。将测序后核酸序列正确的质粒,命名为pUC19-galU&Omp31。使用超微量分光光度计测量质粒浓度,计算拷贝数,用去离子水将质粒进行稀释,使其终浓度为1.93×100~1.93×109 copies·μL-1,-20 ℃保存备用。计算公式:质粒拷贝数(copies·μL-1)=6.02×1023×10-9×质粒浓度(ng·μL-1)/质粒碱基长度×660。
采用方阵法优化引物与探针浓度,总体系为20 μL,SuperReal荧光定量预混试剂10 μL、引物终浓度为500、250、125 nmol·L-1以及探针终浓度为250、125、62.5 nmol·L-1,1.93×106 copies·μL-1的重组质粒3 μL,去离子水2.5 μL。Ct值以平均值(x¯)±标准差(s)表示。
使用浓度为1.93×109 copies·μL-1重组质粒pUC19-galU&Omp31,进行连续10倍稀释,取浓度为1.93×103~1.93×109 copies·μL-1作为模板,每个浓度做3个重复,进行双重TaqMan荧光定量PCR扩增。以质粒浓度为横坐标,以循环阈值(cycle threshold,Ct)为纵坐标,绘制标准曲线。
使用羊种布鲁菌、牛种布鲁菌A19株、不动杆菌、产气荚膜梭菌、肠致病性大肠埃希氏菌、致脑膜炎性大肠埃希氏菌、巴氏杆菌DNA分别作为模板,去离子水作为阴性对照,按优化后的双重TaqMan荧光定量PCR反应体系进行扩增,检测该方法的特异性。
将重组质粒pUC19-galU&Omp31进行连续10倍倍比稀释,即1.93×100~1.93×104 copies·μL-1 5个浓度的质粒作为模板,按优化后的双重TaqMan荧光定量PCR反应体系进行扩增,去离子水做阴性对照,检测该方法的灵敏性。
将羊种布鲁菌、牛种布鲁菌A19株、猪种布鲁菌S2株的核酸进行连续10倍倍比稀释,即1 ng·μL-1~0.1 fg·μL-1 8个浓度,以此作为模板,按优化后的双重TaqMan荧光定量PCR反应体系进行扩增,去离子水作阴性对照,确定最低核酸检出浓度。
选取1.93×104、1.93×105、1.93×106 copies·μL-1 3个浓度重组质粒pUC19-galU&Omp31作为模板,每种浓度进行3次重复,通过双重TaqMan荧光定量PCR扩增后,计算得出组内变异系数。每个梯度在3个不同批次分别做3个重复,计算得出组间的变异系数。根据公式:变异系数(CV)=标准差(s)/平均值(x¯)×100%,计算出组内和组间变异系数。
对临床采集和实验室制备的牛种布鲁菌A19疫苗免疫后流产奶牛血清、临床鹿血清、布病阴性羊血清、羊种布鲁菌感染羊血清、羊免疫菌影疫苗血清、羊种布鲁菌感染豚鼠血清、豚鼠免疫gaIU缺失弱毒疫苗血清和羊种布鲁菌感染羊脾脏进行核酸提取,用本研究建立的双重TaqMan荧光定量PCR方法进行检测,分析gaIU和OMP31基因作为探针的双重TaqMan荧光定量PCR检测方法的敏感性、特异性及鉴别诊断能力,同时用BCSP31-PCR和虎红平板凝集试验进行符合试验,分析其实用性。
通过NCBI primer-BLAST软件检索。结果显示,galU-F/R(JOB ID:-_EkqOHC7GrLVPZR-zHSY4Eqw1GsOdhMrQ)引物具有良好的特异性可作为布鲁菌属通用检测引物,Omp31-F/R(JOB ID:cHqusxahGwk8Nx4yE1I6AGlJKzJEWjAvRQ和JOB ID:hoxZ1Z_Bkmm1V4hShTKsYP8pvVLSOqZP0w)引物可以扩增其它种布鲁菌基因组片段但无法扩增牛种布鲁菌基因组片段。
以羊种布鲁菌的核酸序列为模板,使用P-galUF/R、P-Omp31-F/R、pUC19-F/R通过PCR扩增目的片段。结果(图1)所示,获得与预期大小一致的目的片段,分别为galU(917 bp)、Omp31(755 bp)及pUC19线性化片段(2 698 bp)。将带有同源臂扩增产物与线性化pUC19片段通过无缝克隆连接以构建重组质粒,送上海生工生物工程技术服务有限公司测序,并命名为pUC19-galU&Omp31。提取重组质粒,测得重组质粒的浓度为90.7 ng·μL-1。经计算,pUC19-galU&Omp31重组质粒的拷贝数为1.93×1010 copies·μL-1。
使用1.93×106 copies·μL-1pUC19-galU&Omp31重组质粒采用方阵法对引物和探针浓度优化(表2),确定双重TaqMan荧光定量PCR总体系为20 μL:SuperRealPreMix(Probe)10 μL,galU-F/R和Omp31-F/R各1 μL,galU-P和Omp31-P各0.25 μL,重组质粒模板3 μL,去离子水2.5 μL。反应程序:95 ℃ 15 min;95 ℃ 3 s,57 ℃ 30 s,共40个循环。将重组质粒pUC19-galU&Omp31连续10倍稀释,使用浓度1.93×103~1.93×109 copies·μL-1作为模板,进行双重TaqMan荧光定量PCR扩增绘制标准曲线。结果显示,最佳引物浓度为500 nmol·L-1,探针125 nmol·L-1(表2),galU的标准曲线为y=-3.561x+44.069,R2=0.999,Omp31的标准曲线为y=-3.38x+43.455,R2=0.998(图2)。
利用本研究已建立的双重TaqMan荧光定量PCR方法对羊种布鲁菌、牛种布鲁菌A19株、不动杆菌、产气荚膜梭菌、肠致病性大肠埃希氏菌、产肠毒素大肠埃希氏菌、巴氏杆菌、变形杆菌、铜绿假单胞菌DNA进行扩增。结果显示,该方法特异性良好,羊种布鲁菌DNA扩增结果显示galU及Omp31阳性,牛种布鲁菌A19株DNA扩增结果显示galU阳性,Omp31阴性,其他细菌核酸扩增结果均显示阴性。
本研究将pUC19-galU&Omp31重组质粒进行梯度稀释后,1.93×100~1.93×104 copies·μL-1 5个梯度浓度进行双重TaqMan荧光定量PCR扩增。结果显示,该方法最低能检测到1.93×100 copies·μL-1。
本研究将牛种布鲁菌A19株、猪种布鲁菌S2株核酸,进行连续10倍稀释,1 ng·μL-1~0.1 fg·μL-1 8个梯度作为模板。双重TaqMan荧光定量PCR方法与BCSP31-PCR方法进行比较,双重TaqMan荧光定量PCR方法核酸最低检出浓度为0.1 fg·μL-1,PCR方法核酸最低检出浓度为100 fg·μL-1。
本研究将pUC19-galU&Omp31重组质粒进行10倍梯度稀释,取1.93×104~1.93×106 copies·μL-1这3个梯度进行重复性试验,并计算变异系数。结果显示,该方法的组内平均变异系数在0.02%~0.55%之间;组间的变异系数在0.6%~1.8%之间。
利用建立的布鲁菌双重TaqMan荧光定量PCR分别检测牛种布鲁菌A19疫苗免疫后流产奶牛血清、临床采集的鹿血清、布病阴性羊血清、羊种布鲁菌感染羊血清、羊免疫菌影疫苗血清、羊种布鲁菌感染豚鼠血清、豚鼠免疫gaIU缺失弱毒疫苗血清以及布病感染羊脾脏。
2.8.1.1 临床采集的鹿血清检测:临床采集52份鹿血清,提取核酸,检测结果如表3所示,双重TaqMan荧光定量PCR检测52份鹿血清中,有47份血清均为布鲁菌核酸检测阳性,其中1份血清为牛种布鲁菌感染血清,其余46份血清为其它种布鲁菌感染血清;与BCSP31-PCR结果比较52份血清中有46份是布病阳性血清,仅有一份血清结果不同,符合率为98%;虎红平板凝集试验结果为52份血清中14份是布鲁菌抗体阳性,检测结果与双重TaqMan荧光定量PCR、BCSP31-PCR方法符合率较低,阳性符合率为29.8%,虎红平板凝集试验结果敏感性低于双重TaqMan荧光定量PCR和BCSP31-PCR。
2.8.1.2 羊种布鲁菌感染的羊脾脏检测:采集羊种布鲁菌感染后45 d的羊脾脏15份,提取核酸,检测结果如表3所示,双重TaqMan荧光定量PCR检测15份脾脏为布鲁菌阳性组织,且均为非牛种布鲁菌感染,BCSP31-PCR仅检测出9例阳性,阳性符合率为60%,BCSP31-PCR敏感性低于双重TaqMan荧光定量PCR检测方法。
2.8.2.1  galU基因缺失布鲁菌菌影疫苗的鉴别诊断:分别采集免疫菌影疫苗羊血清16份,免疫gaIU缺失弱毒疫苗豚鼠血清9份,羊种布鲁菌感染羊血清21份,布病阴性羊血清8份,羊种布鲁菌感染豚鼠血清5份,提取上述血清的核酸,检测结果如表4所示,双重TaqMan荧光定量PCR检测16份免疫菌影疫苗羊血清均未检测到 galU基因和Omp31基因,9份免疫gaIU缺失弱毒疫苗豚鼠血清,均检出Omp31基因且未检测出galU基因,21份羊种布鲁菌感染羊血清,均检测出galU基因和Omp31基因。
2.8.2.2  galU基因缺失弱毒疫苗的鉴别诊断:用免疫galU基因缺失弱毒疫苗豚鼠血清9份以及羊种布鲁菌感染豚鼠血清5份,提取核酸,检测结果如表4所示,双重TaqMan荧光定量PCR检测9份免疫galU基因缺失弱毒疫苗豚鼠血清中均检测到Omp31基因,未检测到galU基因;3份羊布鲁菌攻毒豚鼠血清,均检测到galU基因和Omp31基因。虎红平板凝集试验和BCSP31-PCR均检测出7份阳性,符合率为78%。
2.8.2.3 牛种布鲁菌疫苗株的鉴别诊断:采集临床免疫牛种布鲁菌A19疫苗后出现流产的奶牛血清30份,提取核酸,检测结果如表5所示,双重TaqMan荧光定量PCR检测30份血清中22份检测到gaIU基因,其中Omp31基因检出率为0,说明流产的22头牛均由牛种布鲁菌引起。本方法检出率(73.33%)高于虎红平板凝集试验(53.33%)和BCSP31-PCR(46.67%)。
布鲁菌在人畜间的危害已经引起养殖企业、政府职能部门以及社会的高度关注,我们国家先后出台多个动物布病防控计规划,主要目的是建立科学有效精准的动物布病防控措施,然而因现有疫苗及诊断方法等问题导致动物布病防控措施仍无法取得较好的效果[12⁃16]。基于血清学检测技术操作的复杂性、敏感性、交叉反应及无法鉴别诊断等问题限制了其在动物布病防控中的应用[17⁃21]。为此,加快布鲁菌鉴别诊断技术的创新研究已成为了动物布病防控的重大技术需求,尤其是近年来频繁出现布病疫苗免疫后导致的动物流产及感染人等问题,严重缺乏有效区分自然感染和疫苗免疫的实验室检测手段,为此建立可鉴别的TaqMan荧光定量PCR方法对动物血清进行检测已经成为当前研究的重要方向,尤其是根据产业不同场景需求建立多重探针法荧光定量检测技术可使布鲁菌病原检测方法更精准,更特异[22⁃25]。
为此,本研究中基于galU基因和Omp31基因建立了双重TaqMan荧光定量PCR检测方法,该方法不但以galU基因为靶基因建立通用型布鲁菌病原检测,还以Omp31基因为靶基因区分牛种布鲁菌和其他种布鲁菌,目前还没有基于这两个基因建立双重TaqMan荧光定量PCR检测靶基因的研究。通过对临床样品检测,我们发现该方法比以BCSP31为靶基因的PCR检测方法以及虎红平板凝集试验更精准、更灵敏,并可用于鉴别诊断牛种布鲁菌制备的弱毒疫苗及以galU基因缺失研制的新型弱毒疫苗和菌影疫苗免疫的动物,相比于其他方法应用价值更高,更经济。Sanni等[21]建立了基于布鲁菌Omp31基因TaqMan荧光定量PCR方法,用该方法检测山羊血清,结果显示其灵敏度和特异性均高于iELISA和试管凝集试验,与我们建立的方法结果一致,病原学诊断方法灵敏度和特异性高于血清学诊断方法。利用建立的以galU与Omp31为特异性探针的双重TaqMan荧光定量PCR方法,检测了52份鹿血清,其中有47份血清为阳性,与BCSP31-PCR(46份阳性)和虎红平板凝集试验(14份阳性)相比更敏感,更特异,同时47份鹿阳性血清中还鉴别出1份牛种布鲁菌感染的血清。同时检测的15份羊种布鲁菌感染的羊脾脏样本中均检测出布鲁菌galU基因和Omp31基因,证明羊脾脏感染菌不是牛种布鲁菌感染,与本试验使用的布鲁菌感染毒株为羊种布鲁菌相符,所以该方法能够有效区分牛种和羊种布鲁菌。同时该方法相比于BCSP31-PCR检测方法更灵敏。
此外,该方法对现有的牛种布鲁菌疫苗免疫的动物和以缺失galU基因研制的新型疫苗均具有鉴别诊断能力,通过检测galU基因缺失的布鲁菌弱毒疫苗免疫的豚鼠,菌影疫苗免疫的羊以及羊布鲁菌感染的豚鼠和羊的血清,结果显示该方法能够精准区分galU基因缺失弱毒疫苗和菌影疫苗免疫的豚鼠和羊。同时在本研究中,我们针对牛布鲁菌弱毒疫苗株导致的奶牛流产血清进行精准诊断,结果显示该方法还可精准区分牛布鲁菌菌株弱毒疫苗免疫的动物,为现有疫苗和未来新型疫苗建立精准的区分疫苗免疫和自然感染动物的鉴别诊断技术。
本研究建立了一种特异性强、灵敏度高、重复性好的布鲁菌双重TaqMan荧光定量PCR检测方法,用于布鲁菌感染的人和动物及布鲁菌污染的动物产品进行检测以及牛种弱毒疫苗及未来新型疫苗的鉴别诊断,并可与血清学方法联合应用,用于动物布病的精准检测,为动物布病净化提供技术支撑。
  • “十四五”国家重点研发计划(2023YFD1800703)
  • “十四五”国家重点研发计划(2023YFD1802501)
  • 中国农业科学院重大科技任务项目(CAAS-ZDRW202410)
  • 吉林省发展与改革委员会基本建设资金产业技术与开发专项(2024C015-3)
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2026年第57卷第1期
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doi: 10.11843/j.issn.0366-6964.2026.01.032
  • 接收时间:2025-01-22
  • 首发时间:2026-09-16
  • 出版时间:2026-01-23
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  • 收稿日期:2025-01-22
基金
“十四五”国家重点研发计划(2023YFD1800703)
“十四五”国家重点研发计划(2023YFD1802501)
中国农业科学院重大科技任务项目(CAAS-ZDRW202410)
吉林省发展与改革委员会基本建设资金产业技术与开发专项(2024C015-3)
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    中国农业科学院特产研究所,长春 130000

通讯作者:

杨艳玲,主要从事布鲁菌致病机制研究及新型疫苗创制,E-mail:
陈思,主要从事布鲁菌致病机制研究及新型疫苗创制,E-mail:
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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