CN114934045A - 一种食品微生物检测的探针、芯片、试剂盒及方法 - Google Patents
一种食品微生物检测的探针、芯片、试剂盒及方法 Download PDFInfo
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Abstract
本发明提供了针对常见焙烤食品微生物大肠杆菌(Escherichia coli)、斯特菌(Listeriamonocytogenes)、金黄色葡萄球菌(Staphylococcus aureus)、蜡样芽胞杆菌(Bacillus cereus)、创伤弧菌(vibrio vulnificus)、副溶血性弧菌(vibrio parahaemolyticus)的检测引物和探针。通过筛选低同源性序列,分别设计针对这六种食品微生物的特异性引物和特异性探针,采用多重PCR技术,实现对这六种食品微生物的快速有效检测。本发明提供了一种简单、样品需求量小,快速、灵敏度高、易于推广的多种食品微生物的检测方法,并且该试剂盒成本低、适用范围广。本发明还利用液相芯片技术和扫描芯片技术,建立了能特异性检测上述六种食品微生物检测方法,该检测方法能够对目标基因进行快速检测,其检测灵敏度高,特异性好。
Description
技术领域
本发明属于食品微生物检测和分子生物学领域,具体涉及一种食品微生物大肠杆菌(Escherichia coli)、斯特菌(Listeria monocytogenes)、金黄色葡萄球菌(Staphylococcus aureus)、蜡样芽胞杆菌(Bacillus cereus)、创伤弧菌(vibriovulnificus)、副溶血性弧菌(vibrio parahaemolyticus)的检测探针、芯片、试剂盒及方法。
背景技术
微生物与人类活动密切相关,微生物技术广泛用于食品和药品生产、新型材料、能源的开发及环境治理等方面。但另一方面,微生物污染也是引发食源性疾病的主要因素之一,而食品安全是直接关系到人民群众生命、健康和社会稳定的重大公共安全问题。微生物污染存在食品生产、加工、储存、运输、销售到食用的整个过程的每个环节中。食品微生物检验是保证食品安全的技术手段,微生物指标可真实反映食品原料、生产加工过程以及加工环境是否得到有效控制,也是判定食品能否安全食用的科学依据之一。
目前食品中微生物检测主要依据GB 4789系列标准,采用平板计数的方法进行检验。对于非致病菌的检验,按照此种检验方法,耗时较长,例如:菌落总数仅培养时间就需48h,霉菌及酵母菌检验至少则需要5d。而对于致病菌的检测耗时则更长,包括预增菌、增菌、分离、生化试验、镜检以及血清学验证等一系列的检测程序,一般需要5~7d。此外,传统平板计数法对实验室条件(设备设施和环境)、对人员专业技能和人员数量要求高。繁琐的检测程序不仅占用了大量的检测资源,更重要的是冗长的检测周期既不利于生产者对食品的即时监控和在线控制,也不利于监管部门对问题食品的快速反应,尤其是在一些短保质期产品,如部分乳制品、糕点类制品和豆制品的微生物控制方面,其局限性日益显现。
焙烤食品是指以粮、油、糖、蛋、乳等为主料,添加适量辅料,并经调制、成型、焙烤工序制成的食品,常见的包括面包、饼干、糕点等。焙烤食品富含营养,微生物污染后有可能大量增殖引发疾病。焙烤食品引发的食物中毒事件的原因食物包括裱花蛋糕、夹心蛋糕、泡芙面包等,致病因子包括金黄色葡萄球菌、蜡样芽胞杆菌、沙门菌等。目前对焙烤食品微生物污染的专门检测试剂盒和检测方法较少,为提高焙烤食品微生物检测精准度和速度特设计本申请的。
发明内容
本发明的目的是提供一种同时检测多种食品微生物的引物探针组合、试剂盒以及方法,从而解决现有技术中缺乏能够快速有效同时检测大肠杆菌(Escherichia coli)、斯特菌(Listeria monocytogenes)、金黄色葡萄球菌(Staphylococcus aureus)、蜡样芽胞杆菌(Bacillus cereus)、创伤弧菌(vibrio vulnificus)、副溶血性弧菌(vibrioparahaemolyticus),本发明采用如下技术方案:
1.一种同时检测多种焙烤食品微生物的引物和探针组合,该引物探针组合包括:用于检测大肠杆菌(Escherichia coli)的如SEQ ID NO:1-2所示的特异性引物对,如SEQIDNO:3所示的特异性探针;用于检测斯特菌(Listeria monocytogenes)的如SEQ ID NO:4-5所示的特异性引物对,如SEQ ID NO:6所示的特异性探针;用于检测金黄色葡萄球菌(Staphylococcus aureus)的如SEQ ID NO:7-8所示的特异性引物对,如SEQ ID NO:9所示的特异性探针;用于检测蜡样芽胞杆菌(Bacillus cereus)的如SEQ ID NO:10-11所示的特异性引物对,如SEQ ID NO:12所示的特异性探针;用于检测创伤弧菌(vibrio vulnificus)的如SEQID NO:13-14所示的特异性引物对,如SEQ ID NO:15所示的特异性探针;以及用于检测副溶血性弧菌(Vibrio Parahemolyticus)的如SEQ ID NO:16-17所示的特异性引物对,如SEQ ID NO:18所示的特异性探针。
优选地,所述特异性探针的5’端修饰的活性有机基团为氨基或羟基。
优选地,所述上游特异性引物的5’端修饰为生物素标记(如序列表SEQ ID NO:1,5,7,10,13,16)。
优选地,所述特异性引物和探针的靶基因序列如序列表SEQ ID NO:19-24所示。
2.一种同时检测多种焙烤食品微生物的试剂盒,所述试剂盒包括如上所述的同时检测多种食品微生物的引物和探针组合。
优选地,其中12条特异性引物如SEQ ID NO.1-2,4-5,7-8,10-11,13-14,16-17所示;引物探针如序列表SEQ ID NO:3,6,9,12,15,18。
3.一种食品微生物基因检测芯片,采用交联引物探针如序列表SEQ ID NO:3,6,9,12,15,18所示的平面扫描芯片。
4.一种食品微生物基因检测芯片,采用交联引物探针如序列表SEQ ID NO:3,6,9,12,15,18所示的微球探针芯片。
5.一种芯片扫描的食品微生物检测方法,包括:(1)芯片设计与制备,(2)细菌DNA特异性PCR扩增和杂交,(3)芯片杂交与扫描。
6.一种液相芯片检测微生物的方法,包括:(1)微球探针的交联,(2)探针杂交,(3)液相芯片检测。
有益效果:本发明针对大肠杆菌(Escherichia coli)、斯特菌(Listeriamonocytogenes)、金黄色葡萄球菌(Staphylococcus aureus)、蜡样芽胞杆菌(Bacilluscereus)、创伤弧菌(vibrio vulnificus)、副溶血性弧菌(vibrio parahaemolyticus)的基因序列,分别设计针对这六种特异性引物和特异性探针,采用多重PCR技术,实现对这六种食品体的快速有效同时检测,样品需求量小,提供了一种简单、快速、灵敏度高、易于推广的多种食品微生物的检测方法,并且该试剂盒成本低、适用范围广。本发明还利用液相芯片技术和扫描芯片技术,建立了能特异性检测大肠杆菌(Escherichia coli)、斯特菌(Listeriamonocytogenes)、金黄色葡萄球菌(Staphylococcus aureus)、蜡样芽胞杆菌(Bacilluscereus)、创伤弧菌(vibrio vulnificus)、副溶血性弧菌(vibrio parahaemolyticus)六种食品微生物检测方法,该检测方法能够对目标基因进行快速检测,其检测灵敏度达50拷贝/反应,特异性好。
附图说明
图1为特异性PCR扩增电泳图。其中1和7为大肠杆菌(Escherichia coli)、2和8为斯特菌(Listeria monocytogenes)、3和9为金黄色葡萄球菌(Staphylococcus aureus)、4和10为蜡样芽胞杆菌(Bacillus cereus)、5和11为创伤弧菌(vibrio vulnificus)、6和12为副溶血性弧菌(vibrio parahaemolyticus)。1-6为单重PCR,7-12为多重PCR。
具体实施方法
本发明专利下述实施例中使用方法和装置,如无特殊说明,均为常规方法和装置;所用器材、试剂均为试剂公司购买的常规器材和试剂。为使本发明专利的目的、技术方案和优点更加清楚,下面结合具体实施例对本发明专利的具体实施方式进行详细说明。这些优选实施方式的示例在具体实施例中进行了例示。在此,还需要说明的是,为了避免因不必要的细节而模糊了本发明专利的技术方案,在实施例中仅仅示出了与根据本发明专利的方案密切相关的技术方案和/或处理步骤,而省略了关系不大的其他细节。
实施例1
该实施例提供引物及探针的制备方法,具体如下:
1.筛选靶序列
根据焙烤食品最常见的微生物确定大肠杆菌(Escherichia coli)、斯特菌(Listeria monocytogenes)、金黄色葡萄球菌(Staphylococcus aureus)、蜡样芽胞杆菌(Bacillus cereus)、创伤弧菌(vibrio vulnificus)、副溶血性弧菌(vibrioparahaemolyticus)6种微生物为检测微生物。从GenBank下载全部6种微生物的全长序列,构建本地检索隐马尔可夫检索程序,筛选6种微生物基因组中同源性最低的区段。最终确定大肠杆菌(Escherichia coli)采用NC_025021.1如序列表SEQ ID No.19所示、斯特菌(Listeria monocytogenes)采用NC_003210.1如序列表SEQ ID No.20所示、金黄色葡萄球菌(Staphylococcus aureus)采用NC_007795.1如序列表SEQ ID No.21所示、蜡样芽胞杆菌(Bacillus cereus)采用NZ_CP017060.1如序列表SEQ ID No.22所示、创伤弧菌(vibriovulnificus)采用NZ_CP016321.1如序列表SEQ ID No.23所示、副溶血性弧菌(vibrioparahaemolyticus)采用NC_004603.1如序列表SEQ ID No.24所示,上述序列作为检测靶序列。
2.引物和探针设计
应用NCBI和Primer 5.0序列分析软件进行引物和探针设计,如下表所示,包括:SEQ ID NO:1-18,其中,引物SEQ ID NO:1,5,7,10,13,16的5’带有生物素标记,探针的5’段均带有多聚T的长臂,同时进行氨基修饰,由上海生工生物工程(上海)股份有限公司合成。
表1引物及探针序列
实施例2
该实施例提供实施例1所述引物的扩增特异性检测方法,包括:
1.实验用6菌种为本实验是分离并保存,并采用上海生工试剂盒提取菌液DNA。
2.单对引物PCR反应液的配制配方为:分6管分别加入菌液DNA 10ng,10×buffer(Mg2+)2.5μL,dNTP(2.5mol/L)1.0μL,引物1.0μL,模板2.0μL,HotstarTaq 0.5U,补充ddH2O至25μL。
3.多重PCR反应液的配制配方为:分6管分别加入菌液DNA 10ng,10×buffer(Mg2+)2.5μL,dNTP(2.5mol/L)1.0μL,引物1.5μL(各引物浓度均为1.5),模板2.0μL,HotstarTaq0.5U,补充ddH2O至25μL。
3.上述两种PCR扩增程序:95℃预变性10min,变性95℃30s,退火59.5℃30s,延伸72℃20s,35个循环,72℃4终止延伸1min。反应结束后,取5μL PCR产物在1.5%的琼脂糖凝胶上行电泳检测。结果显示,分别采用单对引物、多重引物对检测目标区域参考品的扩增电泳结果清晰,扩增产物大小从1-6为单重PCR依次为大肠杆菌169bp、斯特菌152bp、金黄色葡萄球菌171bp、蜡样芽胞杆菌163bp、创伤弧菌155bp、副溶血性弧菌164bp,7-12为多重PCR依次为大肠杆菌169bp、斯特菌152bp、金黄色葡萄球菌171bp、蜡样芽胞杆菌163bp、创伤弧菌155bp、副溶血性弧菌164bp均与设计大小一致,引物特异性良好。
实施例3
该实施例提供采用芯片扫描的食品微生物检测方法,包括:
1.芯片设计与制备
采用Spot Array 72点样仪,美国Perkin Elmer的Scan Array Gx Plus扫描仪,美国Hoefer的UVC 5000紫外交联仪jinxin进行实验。寡核苷酸探针用40%二甲基亚砜(DMSO)溶解成40μmol/L后用于点样,每种样品重复点样3次,在每个矩阵顶端和底端均有阳性对照探针。点样后的芯片于湿盒放置5h,室温晾干后用紫外交联仪以600MJ/cm2交联2次。
2.细菌DNA特异性PCR扩增和杂交
按照实施例1所述6种细菌的标准方法进行接种、分离培养,采用天根(Tiangen)公司的细菌基因组DNA提取试剂盒,按说明书提取基因组DNA。细菌DNA进行Klenow酶处理,取13μl基因组DNA,加入1μl表1中探针EcP、LmP、SaP、BcP、VvP、VpP(浓度为100μmol/L),94℃变性3min,冰浴3min,加入dNTP Mixture(2.5mmol/L)2.5μl,Klenow酶(5U/μl)1μl,10×Klenow Buffer 2.5μl,纯化水5μl,37℃孵育1h,75℃20min使酶失活,处理后的模板取6μl用表1引物进行扩增(带F和R的引物),在扩增过程中掺入aa-dUTP对PCR产物进行标记。扩增产物用QIA quick PCR产物纯化试剂盒纯化,加入已掺入aad UTP的阳性对照特异PCR产物,进行Cy3染料的偶联,反应完毕的产物经过纯化后用于芯片杂交。
3.芯片杂交与扫描
在芯片点样区域滴加预杂交液(6×SSC、5×Denhardt's、0.3%SDS、400μg/ml鲑精DNA、50%甲酰胺、200μg/ml酵母tRNA),置于杂交盒中,42℃水浴中预杂交1h。取出芯片,蒸馏水中浸提20次,离心甩干。将扩增产物杂交混合液(3×SSC,5×Denhardt's,0.2%SDS,40%甲酰胺)加入探针区域,杂交盒在42℃水浴中过夜杂交。取出芯片,置于42℃预热的1.8×SSC,0.1%SDS摇洗5min,再依次在0.5×SSC,0.1%SDS、0.5×SSC中各摇洗5min,最后在95%乙醇中浸提10次,离心甩干。用Scan Array Gx Plus扫描仪进行扫描(532nm单色荧光通道,PMT 70%,分辨率10μm),扫描图片用Gene Pix Pro 5.1软件分析探针信号值。阳性信号判断采用探针信号总强度值≥1.5倍背景强度值,即信噪比(signal noise ratio,SNR)≥1.5,同时荧光信号平均值>800或扫描图片上杂交斑点明显可见为判断标准。
结果显示:阳性信号探针均属于靶细菌位置,表明该芯片可用于细菌混合样本检测。同时采用平板计数发计算大肠杆菌(Escherichia coli)原始浓度为11.2×108cfu/ml、斯特菌(Listeria monocytogenes)原始浓度为8.3×108cfu/ml、金黄色葡萄球菌(Staphylococcus aureus)原始浓度为6.5×108cfu/ml、蜡样芽胞杆菌(Bacillus cereus)原始浓度为9.5×108cfu/ml、创伤弧菌(vibrio vulnificus)原始浓度为6.4×108cfu/ml、副溶血性弧菌(vibrio parahaemolyticus)原始浓度为7.1×108cfu/ml。
实施例4
该实施例提供采用微球交联液相分析的食品微生物检测方法,包括:
1.微球探针的交联
取中科雷鸣荧光微球100μL,5000rpm离心10min后弃上清,并用双蒸水洗涤2次;用100μL 0.1mol/L pH6.0的MES重新悬浮后,加入0.2nmol/μL的探针3μL,充分混匀后,加入15%EDC,37℃避光孵育30分钟;离心弃上清,用0.1%SDS洗涤3次后,用50μL TE缓冲液(pH8.0)重新悬浮后,4℃避光保存备用。
2.探针杂交
取PCR产物5μL,加入微球溶液25μL(每种微球按照1500个/25μL),充分混合均匀后先94℃变性3min,然后再50℃孵育30min;接着加入SA-PE(浓度0.2μg/μL)60μL,继续孵育20min,将Luminex 200加热板加热到55℃,并调整至度数状态。孵育结束后直接上机读取信号。
探针特异性的检测按照每个反应25.0μL体系,将六种微球混合,对每一对单一引物进行杂交,检测探针的特异性。结果显示,混合的六种探针针对单对引物扩增片段能有效进行识别捕获,且每种探针对其余两种目的产物没有明显的非特异性杂交信号,其平均荧光强度(Medianfluorenscent intensity,MFI)均低于75。显示设计的探针序列针对六种扩增产物具有较好的特异性。
3.液相芯片检测
液相芯片检测体系的建立将特异性好的探针与多重PCR产物混匀杂交,设置仪器为同时检测6种荧光编码微球。采用建立的液相芯片法进行检测,在Luminex仪器中读取信号,计算每种特异性检测微球平均荧光强度(median fluorescent intensity,MFI)的均数和标准差,以均数+3倍标准差所得的值作为对应检测指标的cut-off值,确定阈值,高于cut-off值就视为阳性。
结果显示,阴性对照采用蒸馏水、引物DNA和阳性样品DNA(酵母),经PCR扩增。所得到的PCR产物用于液相芯片的检测,用液相芯片法测得MFI的均数和标准差,计算阈值为65.24。用建立的液相芯片法进行杂交检测,采用10、50、100拷贝/反应,大肠杆菌(Escherichia coli)、斯特菌(Listeria monocytogenes)、金黄色葡萄球菌(Staphylococcus aureus)、蜡样芽胞杆菌(Bacillus cereus)、创伤弧菌(vibriovulnificus)、副溶血性弧菌(vibrio parahaemolyticus)进行液相芯片检测灵敏度分析,结果如表2所示。当样品浓度为50拷贝/反应时,
表2液相芯片检测灵敏度分析
特异性检测结果表明建立的液相芯片检测方法对大肠杆菌(Escherichia coli)、斯特菌(Listeria monocytogenes)、金黄色葡萄球菌(Staphylococcus aureus)、蜡样芽胞杆菌(Bacillus cereus)、创伤弧菌(vibrio vulnificus)、副溶血性弧菌(vibrioparahaemolyticus)有特异性杂交反应,均为阳性,表明该方法有良好的特异性。所建立的液相芯片检测体系的检测的灵敏度大致为50拷贝/反应。
以上所述仅是本申请的具体实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本申请原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本申请的保护范围。
<110>
<120>一种食品微生物检测的探针、芯片、试剂盒及方法
<160>24
<210>1
<211>20
<212>DNA
<213>人工序列
<400>1
tcagcgcaattgataggcca
<210>2
<211>20
<212>DNA
<213>人工序列
<400>2
tttcgccccatttagtggct
<210>3
<211>30
<212>DNA
<213>人工序列
<400>3
ttttttttttcaattgataggccaaattcc
<210> 4
<211>20
<212> DNA
<213> 人工序列
<400> 4
atcttgcgcgaagccaaaac
<210> 5
<211> 20
<212> DNA
<213> 人工序列
<400> 5
ttggcgctgacataacgagt
<210> 6
<211> 30
<212> DNA
<213> 人工序列
<400> 6
ttttttttttgatacccgag cacttaacac
<210> 7
<211> 23
<212> DNA
<213> 人工序列
<400> 7
agatggtaacggagtacatgtcg
<210> 8
<211> 20
<212> DNA
<213> 人工序列
<400> 8
gcatggtttgctggttgctt
<210> 9
<211>30
<212> DNA
<213> 人工序列
<400> 9
ttttttttttggagtacatg tcgttaaacc
<210> 10
<211> 21
<212> DNA
<213> 人工序列
<400> 10
accattttagtggtacggggg
<210> 11
<211> 20
<212> DNA
<213> 人工序列
<400> 11
tgtccgtttctatcgcgagg
<210> 12
<211> 30
<212> DNA
<213> 人工序列
<400> 12
ttttttttttgttgcaagcg gaaaagagag
<210> 13
<211>20
<212> DNA
<213> 人工序列
<400> 3
gtcgtctgcgtaatgccaac
<210> 14
<211> 20
<212> DNA
<213> 人工序列
<400> 14
caccgctttaatacgcgcaa
<210> 15
<211>30
<212> DNA
<213> 人工序列
<400> 15
ttttttttttatgctaacgg ccaaaggcga
<210> 16
<211> 20
<212> DNA
<213> 人工序列
<400> 16
gcgcagcgacatattgaagg
<210> 17
<211> 20
<212> DNA
<213> 人工序列
<400> 17
tccgcatcgttcccttttga
<210> 18
<211> 30
<212> DNA
<213> 人工序列
<400> 18
ttttttttttcaaggtgtgt atgcagaagg
<210> 19
<211> 1080
<212> DNA
<213> 大肠杆菌(Escherichia coli)
<400> 19
1 atgaatagtt cgacaaagat cgcattggta attacgttac tcgatgccat ggggattggc
61 cttatcatgc cagtcttgcc aacgttatta cgtgaattta ttgcttcgga agatatcgct
121 aaccactttg gcgtattgct tgcactttat gcgttaatgc aggttatctt tgctccttgg
181 cttggaaaaa tgtctgaccg atttggtcgg cgcccagtgc tgttgttgtc attaataggc
241 gcatcgctgg attacttatt gctggctttt tcaagtgcgc tttggatgct gtatttaggc
301 cgtttgcttt cagggatcac aggagctact ggggctgtcg cggcatcggt cattgccgat
361 accacctcag cttctcaacg cgtgaagtgg ttcggttggt taggggcaag ttttgggctt
421 ggtttaatag cggggcctat tattggtggt tttgcaggag agatttcacc gcatagtccc
481 ttttttatcg ctgcgttgct aaatattgtc actttccttg tggttatgtt ttggttccgt
541 gaaaccaaaa atacacgtga taatacagat accgaagtag gggttgagac gcaatcgaat
601 tcggtataca tcactttatt taaaacgatg cccattttgt tgattattta tttttcagcg
661 caattgatag gccaaattcc cgcaacggtg tgggtgctat ttaccgaaaa tcgttttgga
721 tggaatagca tgatggttgg cttttcatta gcgggtcttg gtcttttaca ctcagtattc
781 caagcctttg tggcaggaag aatagccact aaatggggcg aaaaaacggc agtactgctc
841 gaatttattg cagatagtag tgcatttgcc tttttagcgt ttatatctga aggttggtta
901 gatttccctg ttttaatttt attggctggt ggtgggatcg ctttacctgc attacaggga
961 gtgatgtcta tccaaacaaa gagtcatgag caaggtgctt tacagggatt attggtgagc
1021 cttaccaatg caaccggtgt tattggccca ttactgttta ctgttattta taatcattca
<210> 20
<211> 1893
<212> DNA
<213> 斯特菌(Listeria monocytogenes)
<400> 20
1 gtgaaagaaa agcacaaccc aagaaggaag tattgtttaa tctcaggttt agctattatt
61 tttagtttat ggataattat tggaaacggg gcgaaagtac aagcggagac tatcaccgtg
121 ccaacgccaa tcaagcaaat tttttcagat gatgcttttg cagaaacaat caaagacaat
181 ttaaagaaaa aaagtgtgac agatgcagtg acacaaaatg aattaaatag tatagatcaa
241 atcattgcga ataatagtga tattaaatcc gttcaaggaa ttcagtattt acccaatgtg
301 acaaagttat ttttaaacgg gaataaacta acagatataa agcccttagc aaacttgaaa
361 aatttaggat ggcttttttt agacgaaaat aaagttaagg acctaagttc gctcaaggat
421 ttaaaaaaat taaaatcact ttctttggag cataatggta taagtgatat aaacggactt
481 gttcatttac cacagctgga aagtttgtat ttgggaaata ataaaataac ggatataacg
541 gttctttcac gtttaactaa actggatact ttgtctctcg aagataacca aattagtgat
601 attgtgccac ttgcaggttt aactaaattg cagaacctat atttaagtaa aaatcacata
661 agcgatttaa gagcattagc aggacttaaa aatctagatg ttttagaatt atttagccaa
721 gaatgtctta ataagcctat taatcatcaa tctaatttgg ttgttccgaa tacagtgaaa
781 aacactgatg ggtcgttagt gactccagaa ataataagtg atgatggcga ttatgaaaaa
841 cctaatgtta aatggcattt accagaattt acaaatgaag tgagttttat tttctatcag
901 ccagtcacta ttggaaaagc aaaagcaaga tttcatggga gagtaaccca accactgaaa
961 gaggtttaca cagtaagtta tgatgttgat ggaacggtaa taaaaacaaa agtagaagca
1021 gggacgcgga taactgcacc taaacctccg actaaacaag gctatgtttt taaaggatgg
1081 tatactgaaa aaaatggtgg gcatgagtgg aattttaata cggattatat gtccggaaat
1141 gattttactt tgtacgcagt atttaaagcg gaaacgaccg aaaaagcagt caacttaacc
1201 cgctatgtca aatatattcg cgggaatgca ggcatctaca aacttccacg agaagataac
1261 tcgcttaaac aaggaactct agcctcgcac cgctgtaaag ctctaactgt tgatagagaa
1321 gcccgaaatg gcggaaaatt atggtacagg ttaaaaaata ttggctggac taaagcggaa
1381 aacctttcct tagaccgata cgataaaatg gaatatgaca aaggggttac cgcttatgca
1441 agagtgagaa atgcgtctgg aaattcggtt tggacaaaac cctacaacac agccggcgct
1501 aaacacgtga ataagctatc ggtctaccaa ggtaaaaata tgcgtatctt gcgcgaagcc
1561 aaaacaccaa ttactacatg gtatcaattt agcattggtg gtaaagtaat tggttgggtc
1621 gatacccgag cacttaacac attctacaaa caaagcatgg aaaagccaac ccgtttaact
1681 cgttatgtca gcgccaataa agctggcgaa tcgtactata aagtcccggt agcagataat
1741 ccagtcaaaa ggggtacttt agccaagtat aaaaatcaaa agttaattgt tgattgtcaa
1801 gcaaccatcg aaggtcaact ttggtaccga ataaggacta gttccacttt cattggttgg
1861 acgaaagcag ctaatttaag ggcacagaaa taa
<210> 21
<211> 1551
<212> DNA
<213> 金黄色葡萄球菌(Staphylococcus aureus)
<400> 21
1 ttgaaaaaga aaaacattta ttcaattcgt aaactaggtg taggtattgc atctgtaact
61 ttaggtacat tacttatatc tggtggcgta acacctgctg caaatgctgc gcaacacgat
121 gaagctcaac aaaatgcttt ttatcaagtc ttaaatatgc ctaacttaaa tgctgatcaa
181 cgcaatggtt ttatccaaag ccttaaagat gatccaagcc aaagtgctaa cgttttaggt
241 gaagctcaaa aacttaatga ctctcaagct ccaaaagctg atgcgcaaca aaataacttc
301 aacaaagatc aacaaagcgc cttctatgaa atcttgaaca tgcctaactt aaacgaagcg
361 caacgtaacg gcttcattca aagtcttaaa gacgacccaa gccaaagcac taacgtttta
421 ggtgaagcta aaaaattaaa cgaatctcaa gcaccgaaag ctgataacaa tttcaacaaa
481 gaacaacaaa atgctttcta tgaaatcttg aatatgccta acttaaacga agaacaacgc
541 aatggtttca tccaaagctt aaaagatgac ccaagccaaa gtgctaacct attgtcagaa
601 gctaaaaagt taaatgaatc tcaagcaccg aaagcggata acaaattcaa caaagaacaa
661 caaaatgctt tctatgaaat cttacattta cctaacttaa acgaagaaca acgcaatggt
721 ttcatccaaa gcctaaaaga tgacccaagc caaagcgcta accttttagc agaagctaaa
781 aagctaaatg atgctcaagc accaaaagct gacaacaaat tcaacaaaga acaacaaaat
841 gctttctatg aaattttaca tttacctaac ttaactgaag aacaacgtaa cggcttcatc
901 caaagcctta aagacgatcc ttcagtgagc aaagaaattt tagcagaagc taaaaagcta
961 aacgatgctc aagcaccaaa agaggaagac aataacaagc ctggcaaaga agacaataac
1021 aagcctggca aagaagacaa caacaagcct ggtaaagaag acaacaacaa gcctggtaaa
1081 gaagacaaca acaagcctgg caaagaagac ggcaacaagc ctggtaaaga agacaacaaa
1141 aaacctggta aagaagatgg caacaagcct ggtaaagaag acaacaaaaa acctggtaaa
1201 gaagacggca acaagcctgg caaagaagat ggcaacaaac ctggtaaaga agatggtaac
1261 ggagtacatg tcgttaaacc tggtgataca gtaaatgaca ttgcaaaagc aaacggcact
1321 actgctgaca aaattgctgc agataacaaa ttagctgata aaaacatgat caaacctggt
1381 caagaacttg ttgttgataa gaagcaacca gcaaaccatg cagatgctaa caaagctcaa
1441 gcattaccag aaactggtga agaaaatcca ttcatcggta caactgtatt tggtggatta
1501 tcattagcct taggtgcagc gttattagct ggacgtcgtc gcgaactata a
<210> 22
<211> 1416
<212> DNA
<213> 蜡样芽胞杆菌(Bacillus cereus)
<400> 22
1 atgaacaaaa taaaaatgag aaatttcttt aaaattagca tccttacttg tattacacta
61 gcaagtttaa gtacaccatc tactatttta gctgatagtc atccaggtta ctcctacgaa
121 tccaatatag ggtatcaaaa tccatcgtgg atgtcgaaaa tagaaggttc aacaaaaata
181 agtgaaatat ctattccagg gactcacggt acgatggctt tacatggagc gagttttctt
241 gatgaaaatt tgacaagaaa tcaaactatg agtttatccc aacaattaaa ttccggaatt
301 cgatatgtag atatgcgtgt taaacgtgta aaagattctt ttgcaatgta tcatggcgtt
361 gtaaatcaaa aagctgtgtt tgaagatgta ttaaaagaga ccattcaatt tttaaaagat
421 cacccaacag aaacaatatt aatgcgctta aaagaagaaa ctactcctga aagtggatct
481 ctatcatttg aggagatatt tttaaaatat aaaaacgtta atgcttcata tttttgggat
541 cctaattccg taccaacttc agatagaaat aaccctactt taggagatac ccgcgggaaa
601 attgtaatct tacaaaactt tacatccact caattgtacg ggattgatta cgaaggtttg
661 aatatacaag ataaatttga aattggaagc ggaccagacg aaatatatac aaaatggatt
721 gcgataaaaa accatctaca aaatacaaat actaatttta ataatggaaa aatttatctc
781 aaccatttta gtggtacggg gggcgcagcc gcatttttaa ataatgtata tccttggttt
841 gttgcaagcg gaaaagagag cagaaatact gacagtagtc ctaaattgat tcaaacgaat
901 tccactaatg cgtggagtga tttccctcgc gatagaaacg gacaagtata ctatgggggg
961 atgaatacac ttgggaccga actcttacaa caaggcgcaa ttaaacattc tggtatcatc
1021 gcagctgatt ttcccggtcc aggtttaatt gatagtatca ttaaattaaa tggtatacat
1081 tcaaatgaaa aggaaatatt aatttcacaa atatcatctg aatctagtcc tttatcaggg
1141 caacaaaatc gatccagcca aaactttaaa attgatagtt tacctgtagg taccaaagaa
1201 ttaaaatggg ttattgtgcc ttcagaaaaa gattatcctt ctactatttc tttcaatgta
1261 atgattgatg tttccctagg aatagattcc actcgttgga aaaatatttc acatgaatct
1321 aggactgaag cttacacaaa tactaaatat tatattgcaa gtccaattgg tgccactagc
1381 aaattcacag tgaaaatata cgctattaca aattag
<210> 23
<211> 720
<212> DNA
<213> 创伤弧菌(vibrio vulnificus)
<400> 23
1 atgcaagaga attttaaaat tttagtggtt gatgatgatg ctcgcttgcg tgcgttgttg
61 gagcgttatc tatcagagca aggtttccaa gtgcgcagtg tcgctaatgg agagcagatg
121 gatcgcctat tgacccgtga aaacttccac ttaatggtac tggatttaat gctgcctggt
181 gaagacggtc tttcgatttg tcgtcgtctg cgtaatgcca acaacatgtt gcctatcctg
241 atgctaacgg ccaaaggcga tgaagttgat cgcatcgttg gtttagaagt gggcgcggat
301 gactacctgc caaaaccgtt caacccacgt gagttacttg cgcgtattaa agcggtgttg
361 cgtcgtcaaa cgatcgagct gcctggtgca ccaagtgcgg aagagaaaat tgtcgagttt
421 ggtgagtttc gtctgaactt gggcacgcgt gagatgttcc gcggtgatga gccgatgcca
481 ctcacctcgg gtgaatttgc ggtactgaaa tcgctagtga ccaatgcgcg tgaaccgatg
541 tcgcgcgaca agttgatgaa catggcgcgc ggacgtgaat actccgcgat ggaacgttcc
601 attgacgtac aaatttctcg ccttcgtcgc atgttggaag aggacccaag caaacctcgc
661 tacatccaaa ctgtatgggg cttaggttat gtgtttgttc ctgatggcaa accagcttaa
<210> 24
<211> 1164
<212> DNA
<213> 副溶血性弧菌(vibrio parahaemolyticus)
<400> 24
1 atgatcagtt ttggaaatgt gagtgcattg caagcggcga tgccacaagc tcgtaatgag
61 attctaaatg aaggcaaact cagcattggt ggtaaggaat atacgatcaa tgctgctact
121 caagagttta cacgcgcaaa ccctacaagt ggtgcagtcg cgcgcttctt tgaagctact
181 gggaaattat ttcgtgaagg cagcacgcag tctgtggcaa aagcgatcac aaaagcagtg
241 tttgacaacg aacagggaca agctcagcgt ttgcaaacat cgtcttctgt cgagcatggg
301 cagatgttgt ttaaagacgc gaacctcaaa acgccttcag atgttctgaa tgcgtttgcg
361 aagttggaca gcaaaatggt gaagtctcac gccgctgagc tgagccaact tgccgaacga
421 gccatgacag aagtgatgct agagacggat tctggcaaga acctcaaagc gctgattggt
481 gatgatgccg ttaagtcgct cgcggtgcgt gtggtgaaag attacggtgg tggcgtggcg
541 gctgctcaga aaaatccaga agtacgcatc aaccaaatgc aagctgtctt tgacatggag
601 gtgatgcacc taaaagcagc gcagcgacat attgaagggc tcgcaagtac ggatttaaac
661 caaggtgtgt atgcagaagg tcttcctgaa gacgctttca ataaagctgg cgtgacgaac
721 aatgttgaac gcgcagcggc ttggatcatc aacgcttcaa actcaaaagg gaacgatgcg
781 gaaaacatca cgtcattatt gaaagagtac gcgaccaacg gtaaagactt gctgaatatg
841 gacaacctaa aagagttgca tgctcgtttg gtaccaaatg tagaacgcga ttaccgtggg
901 ccaaatatct ctggtggcac attaccatct agtattggtg gggaaggcat gttgaagcaa
961 cacatcgaag gctttttgaa agagaatcca gttgcggaca aagacctcgg taaacattta
1021 tttgctggtg tgattggtta tcacggcttt accgatggca acggacgcat ggggcgcatg
1081 ctttatgcca tcgctgaact gcgtaatgac tcgttcaatc ctctggcgat gaatgctgaa
1141 aatagccttc acggtatcaa ataa
Claims (9)
1.一种同时检测多种焙烤食品微生物的引物和探针组合,其特征在于所述引物探针组合包括:用于检测大肠杆菌(Escherichia coli)的如SEQ ID NO:1-2所示的特异性引物对,如SEQ ID NO:3所示的特异性探针;用于检测斯特菌(Listeria monocytogenes)的如SEQID NO:4-5所示的特异性引物对,如SEQ ID NO:6所示的特异性探针;用于检测金黄色葡萄球菌(Staphylococcus aureus)的如SEQ ID NO:7-8所示的特异性引物对,如SEQ ID NO:9所示的特异性探针;用于检测蜡样芽胞杆菌(Bacillus cereus)的如SEQ ID NO:10-11所示的特异性引物对,如SEQ ID NO:12所示的特异性探针;用于检测创伤弧菌(vibriovulnificus)的如SEQ ID NO:13-14所示的特异性引物对,如SEQ ID NO:15所示的特异性探针;以及用于检测副溶血性弧菌(Vibrio Parahemolyticus)的如SEQ ID NO:16-17所示的特异性引物对,如SEQ ID NO:18所示的特异性探针。
2.根据权利要求1所述的一种同时检测多种焙烤食品微生物的引物和探针组合,其特征在于所述特异性探针的5’端修饰的活性有机基团为氨基或羟基。
3.根据权利要求1所述的一种同时检测多种焙烤食品微生物的引物和探针组合,其特征在于所述如序列表SEQ ID NO:1,5,7,10,13,16上游特异性引物的5’端修饰为生物素标记。
4.根据权利要求1所述的一种同时检测多种焙烤食品微生物的引物和探针组合,其特征在于所述所述特异性引物和探针的靶基因序列如序列表SEQ ID NO:19-24所示。
5.一种同时检测多种焙烤食品微生物的试剂盒,其特征在于所述试剂盒包括特异性引物如SEQ ID NO.1-2,4-5,7-8,10-11,13-14,16-17所示;引物探针如序列表SEQ ID NO:3,6,9,12,15,18。
6.一种芯片扫描的食品微生物检测方法,包括:(1)芯片设计与制备,(2)细菌DNA特异性PCR扩增和杂交,(3)芯片杂交与扫描。
7.一种液相芯片检测微生物的方法,包括:(1)微球探针的交联,(2)探针杂交,(3)液相芯片检测。
8.一种食品微生物基因检测芯片,采用交联引物探针如序列表SEQ ID NO:3,6,9,12,15,18所示的平面扫描芯片。
9.一种食品微生物基因检测芯片,采用交联引物探针如序列表SEQ ID NO:3,6,9,12,15,18所示的微球探针芯片。
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