Antimicrobial Susceptibility and Resistance of Chicken Escherichia coli, Salmonella spp., and Pasteurella multocida Isolates.

The article presents a study which examined the antimicrobial susceptibility and resistance of chicken Escherichia coli, Salmonella spp. and Pasteurella multocida isolates. There are great concerns on the emerging antimicrobial resistance among bacteria that may result in unpredictable antimicrobial susceptibility and failure of therapy. Using a microbroth dilution assay described by the Clinical laboratory Standards Institute, minimal inhibitory concentrations of 14 antimicrobial agents against each bacterial isolate were identified. It found that E. coli and Salmonella isolates were sensitive to ceftiofur and fluoroquinolones but were resistant to other antimicrobials tested, while P. multocida isolates remained sensitive to all the antimicrobial agents tested in a three-year analysis.