Human Microbiota 3rd Lecture
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Questions and Answers

What is the main reason why the role of Malassezia on the skin remains controversial?

  • Its presence in healthy skin and pathologies (correct)
  • Its association with dandruff and eczema
  • Its role in bacterial infections
  • Its impact on gut health

What is the human virome?

  • A collection of all the bacteria found in or on human organs
  • A collection of all the viruses found in or on human organs (correct)
  • A collection of all the parasites found in or on human organs
  • A collection of all the fungi found in or on human organs

What is the primary component of the human gut viral populations?

  • Virus-like particles (VLPs) (correct)
  • Fungi
  • Parasites
  • Bacteria

Which research article discusses a tissue-level atlas of the healthy human virome?

<p>Kumata et al.A tissue level atlas of the healthy human virome.BMC Biology. 2020 (B)</p> Signup and view all the answers

What is the microbial mechanism primarily responsible for causing caries?

<p>Sucrose (dietary sugar intake) (D)</p> Signup and view all the answers

In which part of the body can you find a microbiota with the highest amount of microorganisms per milliliter?

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

What is the main difference between the nasopharynx and oropharynx microbiota in terms of microorganism amount per milliliter?

<p>Oropharynx has a higher amount of microorganisms than nasopharynx. (B)</p> Signup and view all the answers

What percentage of human gut viral populations do bacteriophages make up?

<p>96.1% (D)</p> Signup and view all the answers

What is the potential role of Malassezia according to the text?

<p>Both commensal and pathogen (A)</p> Signup and view all the answers

Which human organ is specifically mentioned in relation to the human virome?

<p>Skin (A)</p> Signup and view all the answers

What is the approximate amount of virus-like particles (VLPs) found in human stools per gram according to the text?

<p>$10^9$ VLPs (D)</p> Signup and view all the answers

Which type of viruses make up the majority of the human gut viral populations?

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

What research field aims to study the correlation between virome, bacteriome, host, and metabolome for respiratory health?

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

What is the approximate amount of microorganisms per milliliter in the nasopharynx microbiota?

<p>$10^5$ m/o (D)</p> Signup and view all the answers

Where do dominant initial colonizers responsible for caries primarily originate from?

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

What is thought to be the main factor contributing to caries among the choices below?

<p>Dietary sugar intake (C)</p> Signup and view all the answers

Which organ stores an estimated $10^{11}$ microorganisms per gram in teeth plaque according to the text?

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

What is the focus of Kumata et al.'s research based on the content?

<p>Tissue-level atlas of human virome (C)</p> Signup and view all the answers

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