4Paterson DL. Resistance in gram-negative bacteria: enterobacteriaceae. Am J Med,2006,119(6 Suppl 1):S20-S28.
5Chowdhary SK, Kolar M, Yeung CK. Urinary tract infection : the urological perspective. Indian J Pediatr,2004,71 : 1117-1120.
6Bradford PA. Extended-spectrum beta-lactamases in the 21st century: Characterization, epidemiology, and detection of this important resistance threat. Clin Microbiol Rev ,2001,14:933-951.
7Woodford N, Kaufmann ME, Karisik E, et al. Molecular epidemiology of muhiresistant Eseherichia coli isolates from community-onset urinary tract infections in Cornwall, England. J Antimicrob Chemother,2007, 59 : 106-109.
8Calbo E, Romani V, Xercavins M, et al. Risk factors for community-onset urinary tract infections due to Escherichia coli harbouring extendedspectrum beta-lactamases. J Antimicrob Chemother,2006 ,57 :780-783.
9Khurana S, Taneja N, Sharma M. Extended spectrum beta-lactamase mediated resistance in urinary tract isolates of family Enterobacteriaceae. Indian J Med Res ,2002,116 : 145-149.