M. tuberculosis complex, AFB Agar Proportion Drugs, Isoniazid, 0.2 µg/mL

Laboratory Fee Schedule

Procedure #: MAD0078A

CPT: 87190

Synonym(s):	M. tuberculosis complex drug susceptibility test (DST), INH @ 0.2 DST, INH @ critical concentration DST
Requisition Form	G-MYCO
Test Description	Susceptibility test to Isoniazid @ 0.2 µg/mL by agar proportion method.
Pre-Approval Needed	N/A
Supplemental Information Required	N/A
Supplemental Form(s)	N/A
Performed on Specimens from (sources)	Pure isolate from human sources
Sample/Specimen Type for Testing	M. tuberculosis complex pure isolate in liquid or on solid culture medium.
Minimum Volume/Size Required	Liquid culture - 2.0 mL Solid culture - Visible growth, more than a single colony
Storage/Preservation Prior to Shipping	Ambient
Transport Medium	N/A
Specimen Labeling	Two patient-specific identifiers required (e.g., patient full name, date of birth, Medical record number) Identifiers on specimen must exactly match submission form.
Shipping and Specimen Handling Requirements	Ship according to Dangerous Goods Regulations, IATA, and/or CFR 49 Category A shipping applies
Method	Agar proportion susceptibility test interpreted as either susceptible or resistant to a specific drug at critical concentration recommended by CLSI
Turn-around Time	14 to 21 days
Interferences/Limitations	Test can only be performed on pure cultures of M. tuberculosis complex
Common Causes for Rejection	Non-viable isolates Cultures overgrown by contaminating organisms Isolate not M. tuberculosis complex
Additional Information	Isolates submitted for this test will be identified by this laboratory. No fee will be charged for this identification unless identification is requested on the G-MYCO requisition form. This laboratory will notify submitter of new drug resistance detected by this test.