Division of Epidemiology, Environmental and Occupational Health
Epidemiology Surveillance System
1998 Report

Exhibit 22 :
Multiple Drug Resistance in Major
Enterobacteriaceae
Blood Isolates,
1992-1998


  Year 1992 1993 1994 1995 1996 1997 1998
Antibiotic Organism %R n %R n %R n %R n %R n %R n %R n
  K. pneumoniae 12.50% 8 33.33% 9 20.00% 10 11.54% 26 5.88% 17 5.56% 36 9.30% 43
  P. mirabilis 91.67% 12 100.00% 16 100.00% 19 100.00% 15 66.67% 9 44.44% 9 50.00% 6
Imipenem E. cloacae 0.00% 5 - - - - 100.00% 2 16.67% 6 16.67% 6 0.00% 6
  E. coli 20.00% 5 57.14% 7 0.00% 2 0.00% 4 71.43% 7 25.00% 12 25.00% 12
  S. marcescens 50.00% 4 50.00% 6 0.00% 2 66.67% 6 16.67% 6 100.00% 3 50.00% 2
  K. pneumoniae 85.71% 7 33.33% 9 71.43% 7 84.62% 13 71.43% 7 75.00% 16 78.57% 14
  P. mirabilis 25.00% 8 11.11% 9 8.33% 12 10.00% 10 60.00% 5 100.00% 2 - -
Aztreonam E. cloacae 66.67% 3 - - - - 100.00% 1 100.00% 4 100.00% 3 - -
  E. coli 0.00% 3 20.00% 5 - - - - 0.00% 3 33.33% 6 33.33% 3
  S. marcescens 33.33% 3 0.00% 1 - - 0.00% 1 0.00% 2 66.67% 3 0.00% 1
  K. pneumoniae 87.50% 8 60.00% 10 86.67% 15 89.29% 28 76.47% 17 80.56% 36 80.00% 45
  P. mirabilis 9.09% 11 0.00% 14 6.25% 16 27.27% 11 12.50% 8 28.57% 7 20.00% 5
Cefazolin E. cloacae 100.00% 5 - - - - 100.00% 2 83.33% 6 100.00% 5 100.00% 6
  E. coli 20.00% 5 14.29% 7 33.33% 3 20.00% 5 14.29% 7 20.00% 15 61.54% 13
  S. marcescens 100.00% 4 100.00% 5 100.00% 2 100.00% 5 100.00% 4 100.00% 2 100.00% 2
  K. pneumoniae 100.00% 7 33.33% 9 60.00% 10 55.00% 20 69.23% 13 64.00% 25 74.29% 35
  P. mirabilis 0.00% 7 0.00% 6 15.38% 13 0.00% 5 0.00% 6 14.29% 7 0.00% 5
Ceftazidime E. cloacae 66.67% 3 - - - - 100.00% 2 100.00% 4 100.00% 4 66.67% 3
  E. coli 50.00% 4 20.00% 5 0.00% 1 0.00% 1 20.00% 5 25.00% 12 66.67% 9
  S. marcescens 25.00% 4 0.00% 2 - - - - 50.00% 4 0.00% 1 100.00% 1
  K. pneumoniae 100.00% 8 100.00% 10 100.00% 16 100.00% 30 100.00% 19 94.74% 38 100.00% 43
  P. mirabilis 28.57% 14 5.88% 17 20.00% 20 26.67% 15 44.44% 9 62.50% 8 60.00% 5
Ampicillin E. cloacae 100.00% 5 - - - - 100.00% 2 100.00% 6 100.00% 6 100.00% 6
  E. coli 50.00% 6 28.57% 7 66.67% 3 100.00% 3 37.50% 8 64.29% 14 76.92% 13
  S. marcescens 100.00% 4 100.00% 6 100.00% 2 100.00% 5 100.00% 6 100.00% 3 100.00% 2
  K. pneumoniae 87.50% 8 100.00% 7 87.50% 8 92.86% 14 88.89% 9 86.96% 23 82.14% 28
  P. mirabilis 27.27% 11 21.43% 14 0.00% 12 8.33% 12 40.00% 5 50.00% 2 0.00% 1
Piperacillin E. cloacae 60.00% 5 - - - - 100.00% 1 100.00% 6 75.00% 4 66.67% 3
  E. coli 60.00% 5 16.67% 6 50.00% 2 33.33% 3 50.00% 2 28.57% 7 83.33% 6
  S. marcescens 25.00% 4 20.00% 5 50.00% 2 - - 0.00% 4 0.00% 1 0.00% 2
  K. pneumoniae 25.00% 8 25.00% 8 21.43% 14 41.38% 29 50.00% 16 45.71% 35 40.91% 44
  P. mirabilis 0.00% 14 0.00% 16 0.00% 20 0.00% 12 22.22% 9 11.11% 9 50.00% 6
Ciprofloxacin E. cloacae 20.00% 5 - - - - 0.00% 2 66.67% 6 0.00% 5 60.00% 5
  E. coli 0.00% 4 0.00% 6 50.00% 2 0.00% 5 12.50% 8 40.00% 15 83.33% 12
  S. marcescens 0.00% 4 16.67% 6 50.00% 2 25.00% 4 16.67% 6 0.00% 3 0.00% 2
  K. pneumoniae 87.50% 8 100.00% 7 83.33% 12 89.29% 28 94.12% 17 91.43% 35 95.45% 44
  P. mirabilis 33.33% 12 0.00% 14 33.33% 15 9.09% 11 42.86% 7 42.86% 7 40.00% 5
Tobramycin E. cloacae 80.00% 5 - - - - 50.00% 2 83.33% 6 66.67% 6 40.00% 5
  E. coli 50.00% 6 50.00% 6 66.67% 3 60.00% 5 25.00% 4 41.67% 12 53.85% 13
  S. marcescens 75.00% 4 50.00% 6 100.00% 2 50.00% 4 50.00% 6 0.00% 1 50.00% 2
  K. pneumoniae 87.50% 8 60.00% 10 87.50% 16 93.55% 31 89.47% 19 83.78% 37 90.91% 44
  P. mirabilis 28.57% 14 7.14% 14 22.22% 18 8.33% 12 55.56% 9 27.27% 11 60.00% 5
Gentamicin E. cloacae 100.00% 5 - - - - 50.00% 2 100.00% 6 66.67% 6 100.00% 6
  E. coli 85.71% 7 42.86% 7 100.00% 3 100.00% 5 37.50% 8 66.67% 15 73.33% 15
  S. marcescens 25.00% 4 50.00% 6 100.00% 2 20.00% 5 66.67% 6 0.00% 3 0.00% 2
  K. pneumoniae 75.00% 8 50.00% 8 72.73% 11 45.83% 24 55.56% 18 60.71% 28 68.29% 41
  P. mirabilis 12.50% 8 0.00% 7 28.57% 14 8.33% 12 7.69% 13 16.67% 6 20.00% 5
Amikacin E. cloacae 100.00% 2 - - - - 0.00% 2 - - 40.00% 5 0.00% 4
  E. coli 40.00% 5 20.00% 5 - - 0.00% 3 25.00% 4 27.27% 11 27.27% 11
  S. marcescens 50.00% 4 0.00% 3 - - 50.00% 2 50.00% 4 0.00% 1 0.00% 1
  K. pneumoniae 42.86% 7 62.50% 8 71.43% 14 69.57% 23 57.89% 19 75.76% 33 88.37% 43
Trimethoprim/ P. mirabilis 28.57% 14 14.29% 14 10.53% 19 30.77% 13 28.57% 7 28.57% 7 75.00% 4
Sulfamethoxazole E. cloacae 20.00% 5 - - - - 100.00% 2 50.00% 6 50.00% 4 83.33% 6
  E. coli 42.86% 7 16.67% 6 50.00% 2 25.00% 4 37.50% 8 9.09% 11 69.23% 13
  S. marcescens 0.00% 3 20.00% 5 100.00% 2 0.00% 3 25.00% 4 0.00% 2 0.00% 2
n = Number of isolates tested for the specific antibiotic.                

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