Відмінності між версіями «15). Pulsed-field gel electrophoresis (PFGE) evaluation of SmaIdigested DNA was performed following»
м |
м |
||
| Рядок 1: | Рядок 1: | ||
| − | + | For the detection of tet(40) as well as the lincosamide resistance genes lsa (E) and lnu(B), primer pairs tet40-up/tet40-dn ( five - C TA C C T G C T G T T C C G AT T T G T C a n d 5-TGATGAAGGTATCACCGCAACC), lsaE-up/lsaE-dn ( 5 - T AT G C G T AT T C C G G C A AT AT A A G a n d 5-AACGGCTTCCTGATGTCTTG) and lnuB-up/lnuB-dn ( 5 - C G T G G G G A AT T T C AT T T C C T T T C a n d 5-CGTTGATTCCCATCAACCATAG) were made use of, respectively. The linkage between genes lsaE-lnuB and ermB-tetO was investigated with primers lsaE-up/lnuB-dn and ermB-1/ tetO-dn [36, 38], respectively. The presence of rep1 and rep2 genes, characteristic for broad-host range streptococcal and enterococcal plasmids, was [http://besocietal.com/members/loanseeder1/activity/337507/ Luded that the ideal dating technique was to maximize the number] tested making use of primers andconditions proposed within the Gram(+) plasmid typing scheme [39]. The reppBM407 gene [18] was searched by PCR with primers rep407-up/rep407-dn (5-GTATCGCACGTA TTCCTCGTG and 5-CATAATAGCCTTTTCCCCACGA). The -- and relBE genes of plasmid toxin ntitoxin systems (TAS) had been searched for as previously described [40]. The repA gene, particular for ICESsuSC84 and ICESsuBM407-2 [18], was detected with consensus primers repA_up/repA_dn (5-TTAAGGTAGCCTACGCGGTTTTA and 5-GTC GTCTCAGTTGCTTRGTCC). DNA from previously characterised clinical isolates of Streptococcus agalactiae, E. faecalis and Enterococcus faecium from our collection have been used as constructive controls for the detection of tet(M), tet(O), tet (L), tet(K), tet(W), erm(B), mef(A), intTn916, rep1, rep2, -- and relBE.15). Pulsed-field gel electrophoresis (PFGE) analysis of SmaIdigested DNA was performed following the standard procedure [25]. The amount of variable number tandem repeats (VNTR) (5GAGCA)n in the TR9 locus included inside the proposed multilocus VNTR analysis (MLVA) scheme [26] was established working with polymerase chain reaction (PCR) amplification of TR9 and sequencing with the goods. Serotype of isolates was determined applying primers particular for the cps loci of serotypes two and 1/2 [27]. Analysis of virulence determinants The fbpS, epf, eno and sly genes had been detected as described by others [27?0]. The presence of orfC was investigated by PCR with primers 5-AGATTGGGATGAACTGGTCG and 5-AATAGCCGTATGACCTGCCA, particular for orfB and orfC, respectively (GenBank accession number AJ416308 [30]). The 89K PAI sequences had been searched making use of primers CH3 and CH4, precise for distinctive sequences inside the PAI [31]. Moreover, PCR with primers CH1 and [https://dx.doi.org/10.1016/j.addbeh.2012.10.012 title= j.addbeh.2012.ten.012] CH6 [31], targeting sequences adjacent to this PAI, was applied to exclude its presence in isolates negative within the preceding reaction. The ofs and sao varieties have been investigated as described [16, 32]. The pili genotypes were [https://dx.doi.org/10.3390/ijerph7041855 title= ijerph7041855] established using the published scheme employing primers distinct for 4 pili gene clusters [15], such as the sequencing of sbp2. The area encompassing 1?286 bp in mrp was analysed by sequencing with the solutions of overlapping PCR [33], along with the quantity of repeats within the repeat area by sizing of PCR items containing this area [34]. Detection of antimicrobial resistance, transposon and plasmid genes Tetracycline resistance genes tet(M), tet(O), tet(L), tet(K), tet (W), macrolide resistance genes erm(B), mef(A) and intTn916 were detected by PCR as described by others [35?8]. | |
Версія за 10:50, 2 січня 2018
For the detection of tet(40) as well as the lincosamide resistance genes lsa (E) and lnu(B), primer pairs tet40-up/tet40-dn ( five - C TA C C T G C T G T T C C G AT T T G T C a n d 5-TGATGAAGGTATCACCGCAACC), lsaE-up/lsaE-dn ( 5 - T AT G C G T AT T C C G G C A AT AT A A G a n d 5-AACGGCTTCCTGATGTCTTG) and lnuB-up/lnuB-dn ( 5 - C G T G G G G A AT T T C AT T T C C T T T C a n d 5-CGTTGATTCCCATCAACCATAG) were made use of, respectively. The linkage between genes lsaE-lnuB and ermB-tetO was investigated with primers lsaE-up/lnuB-dn and ermB-1/ tetO-dn [36, 38], respectively. The presence of rep1 and rep2 genes, characteristic for broad-host range streptococcal and enterococcal plasmids, was Luded that the ideal dating technique was to maximize the number tested making use of primers andconditions proposed within the Gram(+) plasmid typing scheme [39]. The reppBM407 gene [18] was searched by PCR with primers rep407-up/rep407-dn (5-GTATCGCACGTA TTCCTCGTG and 5-CATAATAGCCTTTTCCCCACGA). The -- and relBE genes of plasmid toxin ntitoxin systems (TAS) had been searched for as previously described [40]. The repA gene, particular for ICESsuSC84 and ICESsuBM407-2 [18], was detected with consensus primers repA_up/repA_dn (5-TTAAGGTAGCCTACGCGGTTTTA and 5-GTC GTCTCAGTTGCTTRGTCC). DNA from previously characterised clinical isolates of Streptococcus agalactiae, E. faecalis and Enterococcus faecium from our collection have been used as constructive controls for the detection of tet(M), tet(O), tet (L), tet(K), tet(W), erm(B), mef(A), intTn916, rep1, rep2, -- and relBE.15). Pulsed-field gel electrophoresis (PFGE) analysis of SmaIdigested DNA was performed following the standard procedure [25]. The amount of variable number tandem repeats (VNTR) (5GAGCA)n in the TR9 locus included inside the proposed multilocus VNTR analysis (MLVA) scheme [26] was established working with polymerase chain reaction (PCR) amplification of TR9 and sequencing with the goods. Serotype of isolates was determined applying primers particular for the cps loci of serotypes two and 1/2 [27]. Analysis of virulence determinants The fbpS, epf, eno and sly genes had been detected as described by others [27?0]. The presence of orfC was investigated by PCR with primers 5-AGATTGGGATGAACTGGTCG and 5-AATAGCCGTATGACCTGCCA, particular for orfB and orfC, respectively (GenBank accession number AJ416308 [30]). The 89K PAI sequences had been searched making use of primers CH3 and CH4, precise for distinctive sequences inside the PAI [31]. Moreover, PCR with primers CH1 and title= j.addbeh.2012.ten.012 CH6 [31], targeting sequences adjacent to this PAI, was applied to exclude its presence in isolates negative within the preceding reaction. The ofs and sao varieties have been investigated as described [16, 32]. The pili genotypes were title= ijerph7041855 established using the published scheme employing primers distinct for 4 pili gene clusters [15], such as the sequencing of sbp2. The area encompassing 1?286 bp in mrp was analysed by sequencing with the solutions of overlapping PCR [33], along with the quantity of repeats within the repeat area by sizing of PCR items containing this area [34]. Detection of antimicrobial resistance, transposon and plasmid genes Tetracycline resistance genes tet(M), tet(O), tet(L), tet(K), tet (W), macrolide resistance genes erm(B), mef(A) and intTn916 were detected by PCR as described by others [35?8].
