Antibacterial Susceptibility Testing by the Dip-slide Technique: A Methodological Evaluation

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Abstract
Antibacterial susceptibility testing of urine specimens by the dip-slide method was compared to the standardized disc diffusion method. A boarder line of 12 mm inhibition zone on the slide could be used to select strains resistant to sulphisadimidine, ampicillin, nitrofurantoin or nalidixic acid. In the case of the sulphon-amide, the results were greatly influenced by composition of the medium. Susceptibility testing with the dip-slide method seems to be a usefull test to differentiate strains likely to respond to therapy from resistant strains.

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