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

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

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

Which of the following is NOT a common virulence factor?

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

What is the purpose of Quorum Sensing in a biofilm?

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

Why are antibiotics ineffective in treating chronic periodontitis?

<p>The concentration is too low to be effective (C)</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 (B)</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 (D)</p> Signup and view all the answers

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

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

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

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

Which of the following factors destroy host tissues?

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

Which of the following factors interfere with host defense?

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

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

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

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

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

What is the main cause of dental caries?

<p>Dental plaque biofilm (C)</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 (B)</p> Signup and view all the answers

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

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

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

<p>Contribute to host nutrition (B)</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 (B)</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 (C)</p> Signup and view all the answers

Which bacteria was recognized as the cause of juvenile periodontitis?

<p>Aggregatibacter actinomycetemcomitans (D)</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 (D)</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 (D)</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 (A)</p> Signup and view all the answers

Which complexes are primarily associated with periodontal health?

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

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