Culture tests involve pre-treating specimens and inoculating them onto media to grow bacteria. This method can detect small numbers of Mycobacterium tuberculosis that are difficult to find with smear tests. Culture tests are essential for subsequent tests such as Mycobacterium tuberculosis drug susceptibility tests and species identification tests.
Method
Culture after concentration on 2% Ogawa medium to confirm the growth of Mycobacterium tuberculosis.
Reporting (WHO Scale)
Interpretation
Number of Colonies Grown
Negative(-)
No bacterial growth
+
1-100 colonies (record the exact number if fewer than 50)
++
101-200 colonies
+++
201-500 colonies
++++
Confluent colonies
InsuranceCode
D6011001
Classification Number
누-601가(1)
Turnaround Time
Culture Positive:
Reported after daily monitoring of colony formation and differentiation using Z-N smear and TB Ag MPT64 Rapid test
Culture Negative:
Reported as negative if no bacterial growth is observed after 8 weeks of culture.