Відмінності між версіями «15). Pulsed-field gel electrophoresis (PFGE) evaluation of SmaIdigested DNA was performed following»

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The area encompassing 1?286 bp in mrp was analysed by sequencing of the products of overlapping PCR [33], and the number of repeats within the repeat area by sizing of PCR products containing this region [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 other individuals [35?8]. For the detection of tet(40) along with the lincosamide resistance genes lsa (E) and lnu(B), primer pairs tet40-up/tet40-dn ( 5 - 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 ( five - 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) have been employed, respectively. The linkage among 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 tested applying primers andconditions proposed inside 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) have been searched for as previously described [40]. The repA gene, distinct for ICESsuSC84 and ICESsuBM407-2 [18], was detected with consensus primers repA_up/repA_dn (So cause 20 in the all round sickness absence recorded in the total 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 utilised as optimistic 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) evaluation of SmaIdigested DNA was performed following the normal procedure [25]. The number of variable quantity tandem repeats (VNTR) (5GAGCA)n within the TR9 locus incorporated inside the proposed multilocus VNTR evaluation (MLVA) scheme [26] was established making use of polymerase chain reaction (PCR) amplification of TR9 and sequencing with the items. Serotype of isolates was determined making use of primers distinct for the cps loci of serotypes two and 1/2 [27]. Evaluation of virulence determinants The fbpS, epf, eno and sly genes had been detected as described by other people [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 quantity AJ416308 [30]). The 89K PAI sequences have been searched utilizing primers CH3 and CH4, distinct for unique sequences inside the PAI [31]. In addition, 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 damaging within the prior reaction. The ofs and sao sorts had been investigated as described [16, 32].