Prasad, S VishnuBallal, MamathaShivananda, P G2007-01-042009-05-292007-01-042009-05-292007-01-04Prasad SV, Ballal M, Shivananda PG. Induction of resistance to fluoroquinolones in clinical and environmental isolates of Pseudomonas aeruginosa. Indian Journal of Pathology & Microbiology. 2007 Jan; 50(1): 94-6http://imsear.searo.who.int/handle/123456789/75504An attempt to induce resistance to ciprofloxacin in vitro was made against clinical and environmental isolates of Pseudomonas aeruginosa. This in vitro manipulation of strains resulted in the increase of minimum inhibitory concentration from 0.4 microg/ml to 1 microg/ml of the original strains to 9.0 to 12.5 microg/ml indicating development of resistance to ciprofloxacin and a major decrease in the size of zone diameters of norfloxacin and ofloxacin indicating cross resistance to these agents. Results indicate the induced resistance to ciprofloxacin can promote development of cross resistance to other fluoroquinolones. This suggests that caution should be taken while using fluoroquinolones for the treatment of Pseudomonas aeruginosa infections.engAnti-Bacterial Agents --pharmacologyDrug Resistance, BacterialDrug Resistance, Multiple, BacterialEnvironmental MicrobiologyFluoroquinolones --pharmacologyHumansMicrobial Sensitivity TestsPseudomonas Infections --microbiologyPseudomonas aeruginosa --drug effectsJournal Article