Oligonucleotide primers
All oligonucleotide primers used in this study were synthesized by Invitrogen-Life Technologies (Shanghai
Yingjun Biotechnology Co., Ltd.). The target genes selected for their characteristic were the invA (invasion
protein A) gene in Salmonella [18], the hlyA (transcriptional activator of the virulence factor) gene in L. monocytogenes
[19], the rfbE (attaching and effacing A) gene in E. coli O157:H7 [20], the nuc (thermonuclease) gene in S.
aureus [21] and the ail (chromosomal location) gene in Y. enterocolitica [22], all of which have been reported in the
recent publications as the most specific and reliable genetic targets for the five pathogens. The sequences of the five primer pairs for the m-PCR, their corresponding gene targets and size of expected amplification products are also shown in Table 2. The primer sets targeting the highly conserved regions of the bacterial 16S rRNA gene were forward primer (F: CAGGCCTAACACATGCAAGTC) and reverse primer (R: GGCGGWGTGTACAAGGC) that produced PCR products 1,300 bp in size [23]. 16S rRNA gene was also targeted as an internal control of the presence of bacterial DNA.
Oligonucleotide primers
All oligonucleotide primers used in this study were synthesized by Invitrogen-Life Technologies (Shanghai
Yingjun Biotechnology Co., Ltd.). The target genes selected for their characteristic were the invA (invasion
protein A) gene in Salmonella [18], the hlyA (transcriptional activator of the virulence factor) gene in L. monocytogenes
[19], the rfbE (attaching and effacing A) gene in E. coli O157:H7 [20], the nuc (thermonuclease) gene in S.
aureus [21] and the ail (chromosomal location) gene in Y. enterocolitica [22], all of which have been reported in the
recent publications as the most specific and reliable genetic targets for the five pathogens. The sequences of the five primer pairs for the m-PCR,ยีนเป้าหมายที่สอดคล้องกันของพวกเขาและขนาดของการขยายผลิตภัณฑ์ยังแสดงไว้ในตารางที่ 2 ไพรเมอร์ชุดเป้าหมายสูงบริเวณอนุรักษ์ของเบส 16S rRNA ยีนแบคทีเรียถูกส่งต่อรองพื้น ( F : caggcctaacacatgcaagtc ) และย้อนกลับ ไพรเมอร์ ( R : ggcggwgtgtacaaggc ) ซึ่งผลิตผลิตภัณฑ์ PCR ขนาด 1300 BP [ 23 ] 16S rRNA gene was also targeted as an internal control of the presence of bacterial DNA.
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