Microbial Flora of the Body
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Questions and Answers

What is the dominant bacterial species found in dental plaque?

  • Lactobacilli
  • Streptococcus sanguis (correct)
  • Staphylococcus aureus
  • Corynebacteria
  • Which segment of the digestive tract contains approximately 10^11 bacteria per 1 gram of feces?

  • Small intestine
  • Esophagus
  • Colon (correct)
  • Stomach
  • What is the normal flora composition of the lower respiratory tract?

  • Enterococci
  • Predominantly anaerobic bacteria
  • Lactobacilli spp.
  • Gram-negative bacilli (correct)
  • Which bacterium is commonly found in the vaginal flora?

    <p>Lactobacilli</p> Signup and view all the answers

    What is the approximate number of bacteria present in a milliliter of saliva?

    <p>$10^7$ bacteria</p> Signup and view all the answers

    What term refers to the ability of a germ to trigger morbid, pathogenic phenomena in the host organism?

    <p>Pathogenicity</p> Signup and view all the answers

    Which term describes the different degree of pathogenicity expressed within a microbial species?

    <p>Virulence</p> Signup and view all the answers

    What is the term used to quantify virulence by the number of microorganisms required to kill 50% of a group of animals?

    <p>LD50</p> Signup and view all the answers

    Which factor influences the variability in the expression of pathogenicity of a microbial species?

    <p>Living Conditions</p> Signup and view all the answers

    How do pathogens primarily produce infections in the host organism?

    <p>By direct passage into general circulation</p> Signup and view all the answers

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