AFB Isolate Susceptibility
Brief Description
Susceptibility testing is performed on Mycobacterium tuberculosis (MTB) isolates from new patients and every 3 months thereafter if cultures continue to be positive for MTB. Susceptibility testing is only performed on isolates of the Mycobacterium tuberculosis complex.
Laboratory Unit
Mycobacteriology
Methodology
BD MGIT system
Specimen Collection
Pure culture Isolates:
Pure cultures submitted on solid media such as Middlebrook 7H10/7H11 or Lowenstein-Jensen slants. Cultures submitted in liquid 7H9 broth, MGIT, BacT/Alert MP bottles, VersaTREK bottles.
Storage/Transport
Cultures can be maintained at room temperature (15-30°C) during transit using a Category A shipping container.
Acceptable Specimen Type(s)
Pure culture isolates of Mycobacterium tuberculosis complex.
Test Request
- GPHL Apollo Web Portal
-
Web
Portal Instructions
- For manual orders, download the
GPHL
Submission Form
Possible Results
- Susceptible
- Resistant
- Excessive growth
- Insufficient growth
- Culture Contaminated
Reference Range
N/A
Unacceptable Conditions
- Missing testing requisition
- Missing minimum of 2 patient identifiers
- Improper labeling
- Improper storage/transport of specimen
- No specimen received (empty collection tube).
- Wrong specimen type
Interfering Substances
N/A
Result Reported
- Isolates submitted for susceptibility testing only: 10-14 business days
- Positive culture isolates from clinical specimens: 14-28 business days
Fees
LOINC/Order Codes
29579-0 (Order code: 33950)