5 Questions
What is the role of resident flora in preventing colonization by pathogens?
Competition for receptors on host cells, inhibition by toxic products or bacteriocin production, and other mechanisms.
Which normal flora, when disturbed, can lead to UTI?
E. coli (normal flora of the intestine).
Give an example of normal flora causing disease due to changes in their normal habitat.
Viridans streptococci (normal flora of the URT) causing infective endocarditis in predisposed heart.
How can disturbance of resident flora occur?
Disturbance can occur by broad spectrum antibiotics, leading to super-infections.
What does the term 'normal flora' refer to?
Population of microorganisms inhabiting the skin and mucous membranes of healthy normal people.
Test your knowledge on normal flora, the microorganisms that inhabit the skin and mucous membranes of healthy individuals. Learn about the role of resident flora in preventing pathogen colonization and explore how normal flora can cause disease under certain conditions.
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