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Mycobacterial Infection Genus Features Quiz

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Mycobacterial Infection Genus Features Quiz

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Questions and Answers

What is the primary cause of the acid-fast property of M. tuberculosis?

High protein content in the cell wall

Presence of a specific type of DNA

Exposure to acidic environments

Long-chain fatty acids called mycolic acids in the cell wall (correct)

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 (correct)

Inability to retain the carbol fuchsin stain despite subsequent treatment with an ethanol–hydrochloric acid mixture

Resistance to antimicrobial drugs

High protein content in the cell wall

What percentage of extrapulmonary tuberculosis cases account for tuberculosis of the CNS?

~5% (correct)

~25%

~50%

~15%

What distinguishes Tuberculous Meningitis (TBM) from bacterial meningitis?

Evolution over 1–2 weeks or longer Signup and view all the answers

How does Tuberculoma typically present in the context of CNS infection?

As space-occupying lesions with central caseous necrosis Signup and view all the answers

Which type of stain is required to visualize mycobacteria?

Acid-fast stain Signup and view all the answers

What is the unique feature of most pathogenic mycobacteria in terms of growth?

Slow-growing Signup and view all the answers

What is the doubling time of Mycobacterium tuberculosis?

18 hours Signup and view all the answers

Which type of bacteria are virtually the only ones that are acid-fast?

Aerobic bacteria Signup and view all the answers

What is the pigment production a helpful feature for in the identification of mycobacteria?

Visual appearance under microscope Signup and view all the answers