 In another retrospective study, hospitalization rate due to post-biopsy infections was 3.8 compared to 0.6 p0.001 in patients receiving the standard ciprofloxacin and augmented prophylaxis with ciprofloxacin plus single IM 80mg gentamycin respectively. Of the admitted patients who received standard prophylaxis, 73 had fluoroquinolone resistant E. Coli urinary infection andor bacteremia and only 9 had strains resistant to gentamicin. Multivariate analysis showed that the standard regimen was significantly associated with hospital admission due to post-biopsy infection. The augmented regimen resulted in a cost savings of 15,700 per 100 patients compared to the standard regimen. 