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Table 2 Susceptibility of Gram-negative and Gram-positive strains isolated from patients with indwelling catheters

From: Catheter-associated bacterial flora in patients with benign prostatic hyperplasia: shift in antimicrobial susceptibility pattern

  1994–96 2004–06 2011–15 P value
Gram negative species susceptibility  
 No. of isolates 125 102 110  
No. of isolates with reported susceptibility to:  
 Amox/clav ND 56 (56%) 41 (37%) < 0.01
 Cefuroxime 64 (50%) 40 (40%) 52 (47%) NS
 Cefotaxime/Ceftazidime 68 (53%)* 77 (77%) * 84 (76%) *0.002
 Gentamicin 82 (64%)* 75 (75%) *† 97 (88%)† * < 0.001 † 0.02
 Amikacin 120 (93%) 86 (86%) 100 (91%) NS
 Ciprofloxacin 90 (70%) * 53 (53%) * 58 (53%) *0.01
 Cotrimoxazole 18 (14%) * 58 (58%)* 68 (62%) * < 0.001
 Imipenem ND 98 (98%) 99 (90%) NS
 ESBL + ND ND 13 (12%)
Gram positive species susceptibility  
 No. of isolates 13 36 40  
No. of isolates with reported susceptibility to:  
 Amox/clav 13 (100%) 27 (75%) 32 (80%) NS
 Imipenem 13 (100%) 28 (78%) 32 (80%) NS
 Vancomycin ND 35 (97%) 37 (92%) NS
 HLAR + ND ND 12 (30%)
  1. Not all agents were tested in all isolates. Only those agents were included that were tested in > 90% isolates. In 2004–2006 resistance to imipenem was found in 2 g-negative strains and in 1 Gram-positive strain. No resistance against vancomycin was found at that period. In 2011–15 resistance to imipenem was found in 2 Gram-negative strains, and resistance to vancomycin to in 1 Gram-postive strain
  2. In years 1994–96 susceptibility to imipenem was not tested, however Gram-positive bacteria susceptible to ampicillin or amoxicillin were considered susceptible to imipenem
  3. The * or † character was used to determine which pair of values in the row was compared with a statistical test