Content Status
Type
Linked Node
False Negative MGIT Cultures
Learning ObjectivesDefinitions and potential causes
False negatives are test results reported as negative for a Mycobacterium species present in the patient specimen
Practices that can lead to false negative cultures are :
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Extended exposure to NaOH during processing
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High pH (insufficient neutralization during processing)
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Growth may be inhibited by:
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addition of too much PANTA
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loss of CO2 from MGIT vial headspace
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Resource
Assessment
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Question 1 |
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Answer 2 |
Answer 3 |
Answer 4 |
Correct Answer |
Correct Explanation |
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Part of Post-Test |
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False negatives are test results reported as negative for a Mycobacterium species present in the patient specimen.
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True |
False |
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True |
False negatives are test results reported as negative for a Mycobacterium species present in the patient specimen.
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Yes |
Yes |
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Question 2 |
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Extended exposure to NaOH during processing results in false negatives.
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True |
False |
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True |
Extended exposure to NaOH during processing results in false negatives.
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Yes |
Yes |
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