Content Status
Type
Linked Node
Documentation of MGIT Cultures
Learning ObjectivesDescribe documentation practices for MGIT results
Documentation of MGIT cultures is important to characterise if growth is positive for M. tuberculosis or unexpected result/contamination. The growth is tested for AFB by ZN microscopy and sterility by inoculation on the BHI agar/LJ slant.
The documentation of growth is as follows:
|
MGIT Machine Result |
Growth Characteristics |
ZN Result |
BHI agar/LJ slant result |
Documentation |
|
Positive |
Flakes like growth |
Positive |
No growth |
M. tuberculosis complex detected |
|
Positive |
Flakes like growth Plus turbidity |
Positive |
Growth |
M. tuberculosis complex detected with contamination |
|
Positive |
Flakes like growth
|
Positive |
No Growth |
M. tuberculosis complex not detected but positive for NTMs |
|
Positive |
Turbidity |
Negative |
Not Applicable |
Contamination |
|
Negative |
No growth |
Not Applicable |
Not Applicable
|
Negative for M. tuberculosis complex |
Assessment
|
Question 1 |
Answer 1 |
Answer 2 |
Answer 3 |
Answer 4 |
Correct Answer |
Correct Explanation |
Page id |
Part of Pre-Test |
Part of Post-Test |
|
Flaky and turbid positive MGIT growth indicates which of the following? |
M. tuberculosis complex with contamination |
M. tuberculosis complex |
M. tuberculosis complex not detected |
NTM detected |
1 |
Flaky and turbid positive MGIT growth indicates M. tuberculosis complex with contamination. |
|
Yes |
Yes |
|
Question 2 |
|
|
|
|
|
|
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|
|
Flakes like growth, MGIT positive but does not grow on BHI/LJ indicates which of the following?
|
M. tuberculosis complex with contamination |
M. tuberculosis complex |
M. tuberculosis complex not detected but positive for NTMs |
E. coli detected |
3 |
Flakes like growth, MGIT positive but does not grow on BHI/LJ indicates M. tuberculosis complex not detected but positive for NTMs.
|
|
Yes |
Yes |
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