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Quality control of MGIT DST inoculum is essential for quality DST results. The different aspects of inoculum preparation include:

1. Using the right inoculum​​
2. Using pure cultures only​
3. Using fresh cultures​
4. Using slant < 14 days

Quality aspects for Positive MGIT tube ​include:
1. Time period should be plus 1 day to 5 days from the date of positivity​
2. Homogeneous inoculum​
3. Using sterile glass beads and vortex to break up organism clumps​
4. Too high or too low an inoculum may give error results or un-interpretable results
5. Preparing dilutions according to the procedure​
6. Using an accurate pipette to add inoculum to tubes​

Resource

GLI Practical Guide to TB Laboratory Strengthening

 

Assessment

Question​

 

 

Answer 1​

 

 

Answer 2

 

 

Answer 3

 

 

Answer 4

 

 

Correct answer​

 

 

Correct explanation​

 

 

Page id​

 

 

Part of Pre-test​

 

 

Part of Post-test​

 

 

Quality control of MGIT DST inoculum includes which of the following?

 

 

High inoculum

 

 

Time period to be plus 1 day to 5 days from the date of positivity​

 

 

Non-homogenous suspension

 

 

21-day-old culture

 

 

2

 

 

The time period should be plus 1 day to 5 days from the date of positivity.​

 

 

 

YES

 

 

YES

 

 

 

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