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Table 1 Growth, biochemical reactions, and results of antibiotic susceptibility tests for C. haemolyticum isolates

From: Chromobacterium haemolyticum-induced bacteremia in a healthy young man

  Present case Xan et al.[5]
Characteristic C. haemolyticum C. haemolyticum C. violaceum
Growth on agar (37°C, 5% CO2, 24 h): Non-pigmented Non-pigmented Purple
  Sheep blood 2.3 mm, β-hemolysis 2 mm, β-hemolysis 2 mm, no hemolysis
  Chocolate 2.9 mm 2 mm 2 mm
  Buffered charcoal yeast extract NA 2 mm, flat, dull 2 mm, raised, shiny
  Trypticase soy 2.9 mm 1.8 mm 1 mm
  MacConkey NA 0.2 mm, pinpoint 1 mm
  Hektoen enteric NA No growth 0.2 mm, pinpoint
Indole production (tryptophanase) - - +
Glucose fermentation NA + (weak) +
Utilization of:    
  Mannose - - +
  Mannitol + + -
  Citrate + + -
  Oxidase + + -
  Catalase - + (weak) +
Antimicrobial susceptibility (MIC, μg/mL)    
  Amikacin >32 16, S 3, S
  Cefepime NA >32, R 2, S
  Ceftriaxone NA >32, R >32, R
  Ciprofloxacin <1 0.003, S 0.006, S
  Imipenem 2 6.0, S 1.0, S
  Penicillin NA >32, R >32, R
  Piperacillin/tazobactam NA >256, R 3, S
  Ticarcillin/clavulanate NA >256, R 32, I
  Trimethoprim/sulfamethoxazole NA 0.094, S 0.094, S
  1. MIC minimum inhibitory concentration, NA not assessed.