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Medical Microbiology: Mycobacteria and Related Bacteria

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Medical Microbiology: Mycobacteria and Related Bacteria

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Questions and Answers

What is a key characteristic of mycobacteria?

They lack mycolic acid in their cell wall

They are aerobic and non-motile (correct)

They are gram-positive bacteria

They produce endospores and capsules

Why are mycobacteria considered acid-fast?

They have a hydrophilic cell wall

Their cell wall is rich in mycolic acid (correct)

They lack a cell membrane

They contain endospores

What is the main cause of tuberculosis (TB) in humans and animals?

M. avium

M. tuberculosis (correct)

M. leprae

M. bovis

Which mycobacterium causes leprosy?

M. leprae Signup and view all the answers

What is the main reason mycobacteria are considered acid-fast?

Presence of a hydrophobic, waxy cell wall rich in mycolic acid Signup and view all the answers

What is the most common site of tuberculosis infection?

Lungs (pulmonary TB) Signup and view all the answers

What is the medical classification for the mycobacterium that causes leprosy (Hansen’s disease)?

M. leprae Signup and view all the answers

Which mycobacterium causes tuberculosis (TB) in humans and animals?

Mycobacterium tuberculosis Signup and view all the answers

Which system can tuberculosis affect, in addition to the lungs?

Central nervous system Signup and view all the answers

What is the main cause of the chronic symptoms of tuberculosis?

Delayed hypersensitivity or host tissue reaction response Signup and view all the answers