Subgingival Microorganisms Quiz
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Questions and Answers

Which of the following is true about the bacterial population in a normal, healthy human being?

  • The bacterial population is responsible for causing disease.
  • The bacterial population is equal to the total body weight.
  • The bacterial population is 2 kg in total.
  • The bacterial population is 10 times greater than the total body weight. (correct)
  • Who proposed preventing the entry of microorganisms into the human body?

  • Louis Pasteur (correct)
  • Joseph Lister
  • Pinelopi Pani
  • None of the above
  • Where is the majority of the resident/normal microflora found?

  • Skin
  • Mouth
  • Mucous membranes
  • All of the above (correct)
  • Which of the following is true about the composition of the normal flora within the mouth?

    <p>The composition varies significantly within the mouth.</p> Signup and view all the answers

    When does the normal flora start to form in the oral cavity?

    <p>It varies with age</p> Signup and view all the answers

    Which of the following is NOT a common virulence factor?

    <p>Microbial antagonisms/synergy</p> Signup and view all the answers

    What is the purpose of Quorum Sensing in a biofilm?

    <p>To promote cooperation among bacteria</p> Signup and view all the answers

    Why are antibiotics ineffective in treating chronic periodontitis?

    <p>The concentration is too low to be effective</p> Signup and view all the answers

    What is the main function of adhesins in cell-to-cell adhesion in biofilms?

    <p>To modify the cell surface of bacteria</p> Signup and view all the answers

    What is the purpose of gingival crevicular fluid (GCF) in bacterial survival?

    <p>To provide essential energy sources like glucose and iron</p> Signup and view all the answers

    Which of the following is NOT a suspected virulence factor mentioned in the text?

    <p>Chaperonin 60</p> Signup and view all the answers

    Which of the following factors promote colonization and persistence of bacteria?

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

    Which of the following factors destroy host tissues?

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

    Which of the following factors interfere with host defense?

    <p>Immunosuppressive proteins</p> Signup and view all the answers

    Which of the following bacteria is associated with Necrotizing Periodontal Disease?

    <p>Prevotella Intermedia (P.i.)</p> Signup and view all the answers

    Which of the following is NOT a major niche for oral bacteria?

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

    What is the main cause of dental caries?

    <p>Dental plaque biofilm</p> Signup and view all the answers

    Which age group has an increase in the number and types of bacteria present in the oral cavity?

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

    What is the main difference between supragingival and subgingival environments in the oral cavity?

    <p>Nutrient sources</p> Signup and view all the answers

    What is the role of commensal microbiota in the oral cavity?

    <p>Contribute to host nutrition</p> Signup and view all the answers

    Which bacteria is considered one of the putative periodontal pathogens and is usually found in pockets and colonizes deeper in the tissues?

    <p>Porphyromonas gingivalis</p> Signup and view all the answers

    Which bacteria is associated with 'refractory' periodontitis and is commonly seen in endodontic infection, early stage and progressing periodontitis, and periimplantitis?

    <p>Tannerella forsythia</p> Signup and view all the answers

    Which bacteria was recognized as the cause of juvenile periodontitis?

    <p>Aggregatibacter actinomycetemcomitans</p> Signup and view all the answers

    Which bacteria has the major virulence effect due to its bacterial capsule with antiphagocytic activity against host cells?

    <p>Porphyromonas gingivalis</p> Signup and view all the answers

    Which bacteria is frequently isolated from subgingival plaque and has elevated presence in periodontal lesions?

    <p>Porphyromonas gingivalis</p> Signup and view all the answers

    Why are the orange complex bacteria associated with BOP and PD?

    <p>They are gram-negative rods and cocci</p> Signup and view all the answers

    Which complexes are primarily associated with periodontal health?

    <p>Blue, Yellow, Green, and Orange Complexes</p> Signup and view all the answers

    According to the Non-Specific Plaque Hypothesis, why do some patients develop only gingivitis without any attachment loss?

    <p>The quantity of bacteria mass is important</p> Signup and view all the answers

    What does the Specific Plaque Hypothesis state?

    <p>Only certain plaque is pathogenic and its pathogenicity depends on the presence of specific bacteria</p> Signup and view all the answers

    What does the Ecological Plaque Hypothesis propose?

    <p>A change in key environmental factors will cause a shift in the balance of residential bacterial species, which could then predispose a site to disease</p> Signup and view all the answers

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