12 Questions
Why do mycobacteria leave scars in the lungs even after the body clears the infection?
They have a high lipid content in the cell wall
Which type of ventilation system is recommended when working with mycobacteria in a lab?
Negative air pressure ventilation
What characteristic of mycobacteria makes them difficult to stain using the Gram stain technique?
Presence of interfering cell wall lipids
Which type of safety cabinet is recommended for working with mycobacteria in a lab?
Biological safety cabinet
What is the recommended biosafety level (BSL) when processing specimens that may contain mycobacteria?
BSL-2
What distinguishes Mycobacterium tuberculosis complex from nontuberculous mycobacteria (NTM)?
Their pathogenicity to humans
What is the primary vaccine available for tuberculosis?
BCG vaccine
Why do mycobacteria gram stain poorly?
They have cell wall lipids that block crystal violet penetration
What is the standard time for holding mycobacterial cultures before considering them negative?
6 weeks
Which characteristic describes mycobacteria's growth requirements?
Slow-growing and fastidious
What is the recommended biosafety level for working with cultured mycobacteria organisms?
BSL-3
Which statement best describes the safety measures required when processing specimens that may contain mycobacteria?
Double seal specimens during centrifugation
Test your knowledge about Mycobacteria with this quiz covering characteristics and important information about Mycobacteria including the BCG vaccine for tuberculosis and culture standards. Learn about the aerobic, non-spore forming nature, and high lipid content of Mycobacteria.
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