The plates were incubated at 37 C for 18–22 h, and the triple-resistant colonies (tetr , kanr and ampr ) that appeared were counted. Semiquantitative data derived from at least two similar experiments are shown in Tables 1 and 2.
The plates were incubated at 37 C for 18–22 h, and thetriple-resistant colonies (tetr, kanr and ampr) that appearedwere counted. Semiquantitative data derivedfrom at least two similar experiments are shown inTables 1 and 2.