TABLE 2.

Antimicrobial susceptibility test results for “M. massiliense” and closely related mycobacterial speciesa

AntimicrobialMIC (μg/ml) for:
M. massilienseM. abscessusM. chelonaeM. immunogenum
Clarithromycin0.0641.50.1250.75
Minocycline4>25616>256
Doxycycline0.75>256>256>256
Cefoxitin (disc, 30 μg)>32>32>32>32
Colistin (disc, 50 μg)>2>2>2>2
Rifamplin>32>32>32>32
Ciprofloxacin>32>320.5>32
Sparfloxacin>32>328>32
Ofloxacin>32>322>32
Amikacin483248>256
Imipenem>32>32>32>32
Penicillin>32>32>32>32
Amoxicillin>256>256>256>256
Ceftriaxone>256>256>256>256
Cefotaxime>256>256>256>256
Vancomycin>256>256>256>256
Teicoplanin>256>256>256>256
Metronidazole>256>256>256>256
Tobramycin (disc, 10 μg)>8>8>8>8
Trimethoprim-sulfamethoxazole (disc, 1.25 μg + 23.75 μg)>8 and >152>8 and >152>8 and >152>8 and >152
Acid pipemidic (disc, 20 μg)>16>16>16>16
Isoniazid>10>10NTbNT
Streptomycin>4>4NTNT
Ethambutol>2>2NTNT
  • a Results were reproducible over triplicate testing.

  • b NT, not tested.