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Susceptibility, Mycobacterium tuberculosis
Test Code7950
CPT Codes
87190 (x5)
Includes
Ethambutol, Isoniazid, PZA, Rifampin, Streptomycin
If the organism is resistant to Isoniazid (0.2 mcg/mL), then an additional susceptibility test for Isoniazid (1.0 mcg/mL) will be performed at an additional charge (CPT code(s): 87190).
If the organism is resistant to Isoniazid (0.2 mcg/mL), then an additional susceptibility test for Isoniazid (1.0 mcg/mL) will be performed at an additional charge (CPT code(s): 87190).
Preferred Specimen
Pure isolate collected on an agar slant or MGIT tube in a double-walled container
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 30 days
Refrigerated: 30 days
Frozen: Unacceptable
Refrigerated: 30 days
Frozen: Unacceptable
Methodology
Continuously Monitoring Broth System (a variation of Agar Proportion Method)
Setup Schedule
Report available: 28-29 days
Clinical Significance
Susceptibility reports can be used as a guide in the choice of first course therapy or in confirming antimicrobial resistance that leads to a further course of treatment. Also used to estimate the prevalence of primary and acquired antimicrobial resistance in a community.