SHV, TEM, CTX-M single PCR amplification
To confirm the results obtained by the multiplex
PCR amplification, three single PCR amplification assays
were carried out targeting the SHV, TEM and
CTX-M genes, respectively, using 10 pmol of each
gene-specific primer as given in Table 2 and a HotStarTaq-Master
mix (Qiagen) in a final reaction volume of
25 ml. PCR amplification conditions were as follows:
initial denaturation step at 95 æC for 15 min; 30 cycles
of denaturation at 94 æC for 30 s, annealing at 56 æC for
blaSHV, 50 æC for blaTEM, and 58 æC for CTX-M U1/