A crystalline form ofD-Glucitol, 1-deoxy-1-(methylamino)-, 1-(6-amino-3,5-difluoropyridin-2-yl)-8-chloro-6-fluoro-1,4-dihydro-7 -(3-hydroxyazetidin-1-yl)-4-oxo-3-quinolinecarboxylate (salt)as anitbacterial drug, ways to make it, compositions containing it and methods of treatment of diseases and inhibition of adverse physiological events using it are disclosed.