Evaluation of a new agar medium containing cetrimide, kanamycin and nalidixic acid for isolation and enhancement of pigment production of <i>Pseudomonas aeruginosa</i> in clinical samples

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<jats:title>Abstract</jats:title><jats:p>A new selective agar medium (CKNA), containing cetrimide 0.3 g/l, kanamycin sulfate 50 mg/l, and nalidixic acid 5 mg/l, was developed for the isolation of <jats:italic>Pseudomonas aeruginosa</jats:italic>. It was compared to Nalidixic Acid Cetrimide agar (NAC), Pseudomonas Aeruginosa Selective Agar (PASA) and Pseudosel<jats:sup>TM</jats:sup> agar (CET) using 1,148 clinical specimens. The sensitivities rates of <jats:italic>P. aeruginosa</jats:italic> with CKNA, NAC, PASA, and CET were 88.2%, 81.3%, 79.2%, and 84.0%, respectively. The specificities of CKNA, NAC, PASA, and CET were 99.2%, 98.4%, 99.2%, and 99.7%, respectively.</jats:p>

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