Table 1.

Carbon utilization tests producing results inconsistent with those expected for M. chelonae and M. mucogenicum at two inoculum concentrations and two incubation temperatures

Suspension (avg inoculum, CFU/slant)Incubation temperature (°C)Results
M. chelonaeM. mucogenicum
Citratea,bNo. of testscNo. of correct outcomes (%) withb,d:
No. of testscNo. of correct outcomes (%)CitrateMannitol
A (8.8 × 106)3587 (88)118 (73)5 (46)
A (8.8 × 106)2888 (100)119 (82)6 (54)
B (7.5 × 105)3585 (62)115 (46)5 (46)
B (7.5 × 105)2887 (88)117 (64)5 (46)
  • a Four isolates (one ATCC isolate, three patient isolates).

  • b Expected result: positive.

  • c Includes tests with media from two manufacturers (Remel and NIH Media Unit).

  • d Six isolates (three ATCC isolates, three patient isolates).