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

Exhibit 9 :
Drug Resistance Profile in Vancomycin Resistant Enterococci Blood Isolates,
1992-1998


  Year 1992   1993   1994   1995   1996   1997   1998  
  E. faecium 98.44% 64 97.80% 91 98.41% 189 97.81% 183 99.10% 221 98.07% 207 95.71% 210
Penicillin E. faecalis 40.00% 10 33.33% 18 45.00% 20 42.11% 19 18.18% 22 35.48% 31 25.00% 40
  E. spp. 72.73% 11 76.67% 30 90.48% 21 84.21% 19 100.00% 36 94.23% 52 91.49% 47
Oxacillin E. faecium 100.00% 9 100.00% 14 100.00% 25 90.91% 11 100.00% 21 100.00% 14 100.00% 3
/Methicillin E. faecalis - - 100.00% 3 100.00% 6 100.00% 2 - - - - 100.00% 1
/Nafcillin E. spp. 100.00% 2 33.33% 6 100.00% 1 100.00% 2 100.00% 6 100.00% 12 - -
  E. faecium 95.45% 66 98.23% 113 95.37% 216 96.19% 236 87.76% 286 97.48% 318 96.90% 323
Ampicilin E. faecalis 9.09% 11 38.89% 36 29.03% 31 34.48% 29 14.29% 35 24.44% 45 15.58% 77
  E. spp. 80.00% 20 78.95% 38 85.71% 28 86.05% 43 93.33% 60 95.31% 64 87.84% 74
  E. faecium 95.83% 24 81.82% 44 98.61% 72 87.50% 72 90.80% 87 86.59% 82 75.36% 89
Imipenem E. faecalis 33.33% 6 20.00% 10 42.86% 7 40.00% 5 0.00% 5 0.00% 7 0.00% 8
  E. spp. 100.00% 4 71.43% 7 80.00% 5 87.50% 8 77.78% 9 80.00% 5 66.67% 6
  E. faecium 85.71% 21 67.74% 31 64.71% 102 68.52% 108 73.20% 97 76.09% 92 65.63% 64
Gentamicin E. faecalis - - 70.83% 24 91.67% 24 82.35% 17 80.00% 15 82.35% 17 97.50% 40
  E. spp. 61.54% 13 66.67% 27 68.18% 22 69.23% 26 65.52% 29 84.62% 26 82.35% 17
  E. faecium - - - - 83.33% 48 79.17% 72 82.69% 52 84.13% 63 70.59% 51
Streptomycin E. faecalis - - - - 100.00% 14 75.00% 12 100.00% 9 85.71% 14 91.43% 35
  E. spp. - - - - 81.82% 11 69.23% 13 100.00% 17 60.00% 10 71.43% 7
  E. faecium 89.47% 38 95.12% 41 95.24% 84 97.53% 81 96.19% 105 94.94% 79 92.22% 90
Erythromycin E. faecalis 100.00% 6 93.33% 15 90.00% 10 83.33% 6 100.00% 5 77.78% 9 85.71% 14
  E. spp. 100.00% 6 75.00% 8 100.00% 8 90.91% 11 100.00% 13 90.48% 21 88.89% 9
  E. faecium 63.41% 41 75.93% 54 91.67% 96 98.63% 73 97.62% 126 98.08% 104 98.21% 112
Ciprofloxacin E. faecalis 83.33% 6 20.00% 10 100.00% 11 100.00% 10 100.00% 9 87.50% 16 96.15% 26
  E. spp. 77.78% 9 100.00% 8 100.00% 4 100.00% 3 83.33% 12 93.55% 31 96.43% 28
Antibiotic Organism %R n %R n %R n %R n %R n %R n %R n
  E. faecium - - - - 100.00% 7 93.33% 15 94.87% 39 100.00% 36 100.00% 23
Ofloxacin E. faecalis - - - - 100.00% 1 100.00% 1 - - 85.71% 7 100.00% 5
  E. spp. - - - - 100.00% 5 100.00% 10 88.89% 9 85.71% 7 100.00% 1
  E. faecium 7.14% 14 0.00% 36 1.89% 53 2.53% 79 8.60% 93 1.36% 147 0.66% 151
Chloramphenicol E. faecalis 0.00% 3 0.00% 6 40.00% 5 0.00% 3 50.00% 2 44.44% 9 33.33% 18
  E. spp. 0.00% 2 0.00% 3 0.00% 7 0.00% 7 16.67% 12 10.00% 20 0.00% 21
  E. faecium 34.78% 46 25.00% 72 40.25% 159 41.57% 166 36.79% 212 48.04% 204 54.42% 215
Tetracycline E. faecalis 71.43% 7 66.67% 18 68.42% 19 31.82% 22 33.33% 15 56.00% 25 40.54% 37
  E. spp. 35.00% 20 31.43% 35 40.00% 25 52.78% 36 39.29% 56 60.00% 60 54.39% 57
  E. faecium 41.67% 12 41.18% 17 67.44% 43 42.31% 26 59.09% 22 62.50% 16 83.33% 6
Trimethoprim/ E. faecalis - - 66.67% 3 25.00% 8 33.33% 3 - - 25.00% 4 66.67% 3
Sulfamethoxazole E. spp. 100.00% 2 50.00% 2 50.00% 2 50.00% 6 70.00% 10 75.00% 8 50.00% 2
  E. faecium 30.43% 23 92.00% 25 46.67% 30 45.45% 22 39.29% 28 33.33% 42 44.74% 38
Rifampin E. faecalis 0.00% 1 100.00% 1 50.00% 2 - - 0.00% 3 25.00% 4 40.00% 5
  E. spp. - - - - 50.00% 2 66.67% 3 28.57% 7 0.00% 6 33.33% 3
  E. faecium 0.00% 9 100.00% 1 20.00% 10 5.88% 17 0.00% 10 6.25% 16 0.00% 13
Nitrofurantoin E. faecalis - - - - 0.00% 1 0.00% 4 0.00% 5 0.00% 3 0.00% 5
  E. spp. 0.00% 1 40.00% 5 0.00% 7 11.11% 9 0.00% 3 10.53% 19 4.35% 23
  E. faecium - - - - - - 100.00% 2 88.46% 26 88.52% 61 77.36% 53
Streptomycin 2000 E. faecalis - - - - - - - - 66.66% 6 87.50% 6 80.00% 5
  E. spp. - - - - - - - - 50.00% 4 77.78% 9 90.00% 10
  E. faecium - - - - - - 100.00% 3 88.46% 26 73.77% 61 58.90% 73
Getamicin 500 E. faecalis - - - - - - - - 100.00% 2 100.00% 7 100.00% 5
  E. spp. - - - - - - - - 100.00% 8 72.73% 11 55.00% 20
n = Number of isolates tested for the specific antibiotic.                

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