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

Exhibit 23 :
Multiple Drug Resistance in Gram-Negative
Bacilli 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
  P. aeruginosa 82.35% 51 69.70% 33 70.73% 41 77.78% 45 71.88% 32 73.17% 41 90.91% 55
  S. maltophilia 96.55% 29 96.97% 33 100.00% 31 96.77% 31 100.00% 33 100.00% 42 100.00% 33
Imipenem B. cepacia 75.00% 8 62.50% 8 50.00% 10 66.67% 9 85.71% 7 60.00% 5 100.00% 4
  F. meningosepticum - - - - 100.00% 3 100.00% 1 100.00% 3 85.71% 7 100.00% 5
  A. baumannii - - - - - - 0.00% 3 33.33% 3 46.15% 13 25.00% 28
  P. aeruginosa 15.91% 44 30.00% 30 35.29% 34 41.67% 36 39.29% 28 51.52% 33 57.78% 45
  S. maltophilia 80.00% 15 83.33% 30 81.82% 22 84.00% 25 89.29% 28 90.91% 33 75.76% 33
Aztreonam B. cepacia 57.14% 7 75.00% 8 50.00% 8 14.29% 7 50.00% 4 60.00% 5 0.00% 2
  F. meningosepticum - - - - 100.00% 2 - - 100.00% 3 100.00% 7 100.00% 4
  A. baumannii - - - - - - 50.00% 2 100.00% 1 100.00% 10 100.00% 9
  P. aeruginosa 15.56% 45 25.00% 24 3.03% 33 27.27% 44 33.33% 27 33.33% 39 41.67% 48
  S. maltophilia 40.91% 22 33.33% 30 26.67% 30 18.52% 27 40.00% 30 53.66% 41 35.71% 42
Ceftazidime B. cepacia 40.00% 5 37.50% 8 22.22% 9 0.00% 7 0.00% 7 20.00% 5 0.00% 4
  F. meningosepticum - - - - 100.00% 2 100.00% 1 100.00% 1 100.00% 7 100.00% 5
  A. baumannii - - - - - - 100.00% 2 0.00% 1 71.43% 14 90.48% 21
  P. aeruginosa 21.28% 47 17.86% 28 20.69% 29 34.21% 38 51.72% 29 44.44% 36 61.82% 55
  S. maltophilia 47.83% 23 51.72% 29 60.00% 20 64.29% 28 66.67% 24 54.55% 44 27.27% 33
Piperacillin B. cepacia 25.00% 8 28.57% 7 22.22% 9 33.33% 9 0.00% 7 20.00% 5 0.00% 4
  F. meningosepticum - - - - 0.00% 2 0.00% 1 100.00% 3 0.00% 7 0.00% 1
  A. baumannii - - - - - - 100.00% 2 - - 83.33% 12 100.00% 11
  P. aeruginosa 26.92% 52 32.26% 31 59.46% 37 54.35% 46 63.64% 33 75.00% 40 71.93% 57
  S. maltophilia 20.00% 35 48.65% 37 34.48% 29 30.30% 33 42.42% 33 33.33% 48 15.79% 38
Ciprofloxacin B. cepacia 71.43% 7 25.00% 8 36.36% 11 30.00% 10 0.00% 7 20.00% 5 0.00% 4
  F. meningosepticum - - - - 50.00% 2 0.00% 1 66.67% 3 0.00% 6 25.00% 4
  A. baumannii - - - - - - 100.00% 2 66.67% 3 90.91% 11 96.15% 26
  P. aeruginosa 26.67% 45 43.48% 23 68.42% 38 59.52% 42 55.88% 34 58.97% 39 76.60% 47
  S. maltophilia 74.19% 31 71.88% 32 75.76% 33 86.21% 29 82.14% 28 88.89% 45 86.11% 36
Tobramycin B. cepacia 80.00% 5 100.00% 8 81.82% 11 100.00% 10 85.71% 7 100.00% 4 100.00% 4
  F. meningosepticum - - - - 100.00% 2 100.00% 1 100.00% 3 100.00% 9 66.67% 3
  A. baumannii - - - - - - 66.67% 3 50.00% 4 92.31% 13 57.14% 28
  P. aeruginosa 54.35% 46 62.50% 24 76.92% 39 57.14% 49 62.86% 35 83.72% 43 74.51% 51
  S. maltophilia 72.73% 33 69.44% 36 83.33% 36 62.50% 32 84.85% 33 93.33% 45 92.50% 40
Gentamicin B. cepacia 100.00% 5 100.00% 8 90.91% 11 100.00% 10 85.71% 7 100.00% 4 100.00% 4
  F. meningosepticum - - - - 100.00% 2 100.00% 1 100.00% 3 100.00% 14 66.67% 6
  A. baumannii - - - - - - 66.67% 3 100.00% 4 77.78% 9 96.43% 28
  P. aeruginosa 31.43% 35 52.17% 23 71.79% 39 38.64% 44 16.67% 30 17.07% 41 27.08% 48
  S. maltophilia 67.86% 28 62.16% 37 80.56% 36 65.63% 32 90.91% 33 86.36% 44 81.40% 43
Amikacin B. cepacia 100.00% 6 100.00% 8 88.89% 9 87.50% 8 100.00% 7 100.00% 5 75.00% 4
  F. meningosepticum - - - - 100.00% 3 100.00% 1 100.00% 3 57.14% 7 60.00% 5
  A. baumannii - - - - - - 100.00% 3 50.00% 4 76.92% 13 44.44% 27
  P. aeruginosa 97.44% 39 78.95% 19 81.82% 22 86.36% 22 90.00% 10 96.15% 26 97.67% 43
Trimethoprim/ S. maltophilia 3.45% 29 12.50% 32 7.41% 27 3.45% 29 9.68% 31 16.28% 43 5.71% 35
Sulfamethoxazole B. cepacia 0.00% 5 25.00% 4 14.29% 7 0.00% 8 0.00% 2 0.00% 4 0.00% 2
  F. meningosepticum - - - - 50.00% 2 100.00% 1 0.00% 3 25.00% 8 0.00% 5
  A. baumannii - - - - - - 66.67% 3 66.67% 3 78.57% 14 88.46% 26
n = Number of isolates tested for the specific antibiotic.                

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