Title : Behaviour of TEM-1 beta-lactamase as a resistance mechanism to ampicillin, mezlocillin and azlocillin in Escherichia coli.

Pub. Date : 1986 Feb

PMID : 3516962






3 Functional Relationships(s)
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1 Escherichia coli isolates which synthesised the extremely common "TEM-1" plasmid mediated beta-lactamase were more resistant to the alpha-aminopenicillins, ampicillin, mezlocillin and azlocillin, than were strains which lacked this enzyme. Mezlocillin hypothetical protein Escherichia coli
2 However, many TEM-1+ isolates remained sensitive to therapeutic concentrations of mezlocillin (less than 64 mg/l), whereas virtually none was susceptible to such levels of ampicillin or azlocillin. Mezlocillin hypothetical protein Escherichia coli
3 Transconjugants of E. coli K12 into which we introduced various TEM-1 coding plasmids similarly acquired lower levels of resistance to mezlocillin than to ampicillin and azlocillin. Mezlocillin hypothetical protein Escherichia coli