Frequency of antimicrobial resistance and plasmid profiles of Escherichia coli strains isolated from milk
Ombui JN, Macharia JK, Nduhiu G
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Susceptibility to eight commonly used antimicrobial agents and plasmid profile analysis was done on forty one Escherichia coli strains isolated from milk. Most (95%) of the strains were resistant to sulphamethoxazole with a relatively low rate of resistance to the other antimicrobial agents. Twenty nine per cent of the isolates showed multiple resistance. The number of plasmids carried per strain was between 1 and 5, while plasmid sizes ranged between 107 and 1.0 megadaltons (MDa). There was no relationship between carriage of plasmids and antimicrobial resistance patterns.