<p>Ouinolinecarboxylic acid derivatives, such as compound 7-fluoro-8-(4-methyl-1-piper-azinyl)-5-oxo-1,2-dihydro-5H-thiazolo(3,2-a)-quinoline-4-carboxylic acid, a pharmaceutical composition containing.The safe and methods of treatment of bacterial and fungal infections using the same.</p>
