Division of Epidemiology, Environmental and Occupational Health
Epidemiology Surveillance System
1995-1997 Report

Exhibit 21:
Drug Resistance Profile in Major Enterobacteriaceae Blood Isolates,
1995-1997


    Kleb. Pneumo.   Pro. mirabilis   Entero. cloacae   E. coli Ser. Marcescens  
Antibiotic Year %R n %R n %R n %R n %R n
  95 11.54% 26 100.00% 15 100.00% 2 0.00% 4 66.67% 6
Imipenem 96 5.88% 17 66.67% 9 16.67% 6 71.43% 7 16.67% 6
  97 5.56% 36 44.44% 9 16.67% 6 25.00% 12 100.00% 3
  95 84.62% 13 10.00% 10 100.00% 1 - - 0.00% 1
Aztreonam 96 71.43% 7 60.00% 5 100.00% 4 0.00% 3 0.00% 2
  97 75.00% 16 100.00% 2 100.00% 3 33.33% 6 66.67% 3
  95 89.29% 28 27.27% 11 100.00% 2 20.00% 5 100.00% 5
Cefazolin 96 76.47% 17 12.50% 8 83.33% 6 14.29% 7 100.00% 4
  97 80.56% 36 28.57% 7 100.00% 5 20.00% 15 100.00% 2
  95 55.00% 20 0.00% 5 100.00% 2 0.00% 1 - -
ceftazidime 96 69.23% 13 0.00% 6 100.00% 4 20.00% 5 50.00% 4
  97 64.00% 25 14.29% 7 100.00% 4 25.00% 12 0.00% 1
  95 100.00% 30 26.67% 15 100.00% 2 100.00% 3 100.00% 5
Ampicillin 96 100.00% 19 44.44% 9 100.00% 6 37.50% 8 100.00% 6
  97 94.74% 38 62.50% 8 100.00% 6 64.29% 14 100.00% 3
  95 92.86% 14 8.33% 12 100.00% 1 33.33% 3 - -
Piperacillin 96 88.89% 9 40.00% 5 100.00% 6 50.00% 2 0.00% 4
  97 86.96% 23 50.00% 2 75.00% 4 28.57% 7 0.00% 1
  95 41.38% 29 0.00% 12 0.00% 2 0.00% 5 25.00% 4
Ciprofloxacin 96 50.00% 16 22.22% 9 66.67% 6 12.50% 8 16.67% 6
  97 45.71% 35 11.11% 9 0.00% 5 40.00% 15 0.00% 3
  95 89.29% 28 9.09% 11 50.00% 2 60.00% 5 50.00% 4
Tobramycin 96 94.12% 17 42.86% 7 83.33% 6 25.00% 4 50.00% 6
  97 91.43% 35 42.86% 7 66.67% 6 41.67% 12 0.00% 1
  95 93.55% 31 8.33% 12 50.00% 2 100.00% 5 20.00% 5
Gentamicin 96 89.47% 19 55.56% 9 100.00% 6 37.50% 8 66.67% 6
  97 83.78% 37 27.27% 11 66.67% 6 66.67% 15 0.00% 3
  95 45.83% 24 8.33% 12 0.00% 2 0.00% 3 50.00% 2
Amikacin 96 55.56% 18 7.69% 13 - - 25.00% 4 50.00% 4
  97 60.71% 28 16.67% 6 40.00% 5 27.27% 11 0.00% 1
  95 69.57% 23 30.77% 13 100.00% 2 25.00% 4 0.00% 3
Trimethoprim/ 96 57.89% 19 28.57% 7 50.00% 6 37.50% 8 25.00% 4
Sulfamethoxazole 97 75.76% 33 28.57% 7 50.00% 4 9.09% 11 0.00% 2
n = Number of isolates tested for the specific antibiotic.              

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