Microbiology Quiz: Bacteria Count in a Lecture Theatre
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Questions and Answers

What is the approximate number of bacteria present in an average lecture theatre?

  • 20 billion
  • 20 quintillion (correct)
  • 20 trillion
  • 20 quadrillion

How many unique microbial genes are present in the human microbiome?

  • 10 million unique microbial genes (correct)
  • 100 million unique microbial genes
  • 100,000 unique microbial genes
  • 1 million unique microbial genes

What is the relationship type where one organism benefits and the other is unaffected?

  • Both benefit
  • Commensalism (correct)
  • Mutualism
  • Parasitism

Which body site has the most diverse microbiota?

<p>Gut (D)</p> Signup and view all the answers

What functions do the human microbiome serve?

<p>Protective and metabolic functions (B)</p> Signup and view all the answers

Where does the acquisition of a person's microbiome typically start?

<p>Sterile (Cesarean section) environment (A)</p> Signup and view all the answers

What plays a role in immune tolerance according to the text?

<p>Diet (B)</p> Signup and view all the answers

Which of the following predominantly colonizes the skin and skin structures, according to the text?

<p>Coagulase negative staphylococci (D)</p> Signup and view all the answers

What type of flora is normally present on the skin?

<p>Resident flora (D)</p> Signup and view all the answers

At what age is the microbiota thought to 'stabilize' according to the text?

<p>3-4 years (D)</p> Signup and view all the answers

Which factors affect the microbiota based on the text?

<p>Diet, environment, and host genetics (C)</p> Signup and view all the answers

What has low-level microbiome according to the text?

<p>Placenta (C)</p> Signup and view all the answers

What is the most cost-effective infection control measure?

<p>Hand hygiene (B)</p> Signup and view all the answers

What factor can reduce compliance rates for hand disinfection?

<p>Wearing jewellery (B)</p> Signup and view all the answers

Which of the following is NOT mentioned as part of the normal flora of the respiratory tract?

<p>Enterococci (C)</p> Signup and view all the answers

What does dysbiosis refer to?

<p>A microbial imbalance on or inside the body (C)</p> Signup and view all the answers

Which of the following is a component of the gut microbiome?

<p>Archaea (B)</p> Signup and view all the answers

How can dysbiosis affect long-term metabolic consequences?

<p>By disrupting the composition and diversity of microbiota (D)</p> Signup and view all the answers

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