TABLE 2.

Cross-resistance in isolates exhibiting resistance against any aminoglycoside or cyclic polypeptidea

Cross-resistance patternStreptomycin (ECOFF: S ≤ 2)Amikacin (ECOFF: S ≤ 1)Kanamycin (ECOFF: S ≤ 4)Capreomycin (ECOFF: S ≤ 4)Viomycin (ECOFF: S ≤ 2)No. of isolatesb
1RSSSS10
2RRRRS4*
3SRRRS2*
4RRRSS1
5SSSRR1
  • a The isolates were classified as susceptible (S) or resistant (R) according to tentative ECOFFs (mg/liter).

  • b *, 5 isolates with an MIC for capreomycin (8 mg/liter) higher than the ECOFF (4 mg/liter) would have been interpreted as susceptible according to the critical concentration for capreomycin (10 mg/liter).