10 Questions
What is the primary cause of the acid-fast property of M. tuberculosis?
Long-chain fatty acids called mycolic acids in the cell wall
What is the term 'acid-fast' referring to in the context of mycobacteria?
Ability to retain the carbol fuchsin stain despite subsequent treatment with an ethanol–hydrochloric acid mixture
What percentage of extrapulmonary tuberculosis cases account for tuberculosis of the CNS?
~5%
What distinguishes Tuberculous Meningitis (TBM) from bacterial meningitis?
Evolution over 1–2 weeks or longer
How does Tuberculoma typically present in the context of CNS infection?
As space-occupying lesions with central caseous necrosis
Which type of stain is required to visualize mycobacteria?
Acid-fast stain
What is the unique feature of most pathogenic mycobacteria in terms of growth?
Slow-growing
What is the doubling time of Mycobacterium tuberculosis?
18 hours
Which type of bacteria are virtually the only ones that are acid-fast?
Aerobic bacteria
What is the pigment production a helpful feature for in the identification of mycobacteria?
Visual appearance under microscope
Test your knowledge about the genus features of mycobacteria, important causes of human diseases such as tuberculosis and Hansen disease. Explore their unique cell wall and visualization requirements.
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