Antimicrobials in Anaerobic Infections: Dental Implications
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary mechanism of action of metronidazole against anaerobic bacteria?

  • Damaging microbial DNA (correct)
  • Inhibiting protein synthesis
  • Inhibiting cell wall synthesis
  • Disrupting membrane function

Which of the following is NOT a characteristic of metronidazole's pharmacokinetics?

  • Poorly bound to plasma proteins
  • Diffuses well into the tissues including brain
  • Well absorbed after oral administration
  • Extensively metabolized in the brain (correct)

Why is metronidazole ineffective against aerobic bacteria?

  • It cannot be reduced to its active metabolite in the presence of oxygen (correct)
  • It is not metabolized in the liver
  • It is unable to diffuse into the tissues
  • It is not absorbed after oral administration

What is the name of the group of antimicrobials that includes metronidazole, tinidazole, and secnidazole?

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

What is the effect of metronidazole on microbial DNA?

<p>It damages microbial DNA (A)</p> Signup and view all the answers

What is a common side effect of metronidazole in the gastrointestinal system?

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

What is the primary route of excretion for metronidazole metabolites?

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

What is the interaction between metronidazole and warfarin?

<p>Metronidazole potentiates the anticoagulant effect of warfarin (B)</p> Signup and view all the answers

Why should metronidazole be avoided in pregnant women?

<p>It causes teratogenic effects in experimental animals (C)</p> Signup and view all the answers

What is the dose of metronidazole used to treat Vincent's angina?

<p>200-400 mg three times daily for 7 days (B)</p> Signup and view all the answers

What is the effect of metronidazole on lithium?

<p>It decreases the renal clearance of lithium (D)</p> Signup and view all the answers

What is the disulfiram-like reaction caused by?

<p>Taking metronidazole with alcohol (A)</p> Signup and view all the answers

What is the primary use of metronidazole in the treatment of alveolar abscess?

<p>In combination with penicillins such as penicillin V or amoxicillin (B)</p> Signup and view all the answers

Which antibiotic is used in combination with metronidazole for the treatment of anaerobic brain abscess?

<p>A third-generation cephalosporin (A)</p> Signup and view all the answers

What is the advantage of metronidazole over vancomycin in the treatment of antibiotic-associated pseudomembranous colitis?

<p>It is cheaper and less toxic (C)</p> Signup and view all the answers

What is the recommended treatment duration for metronidazole in the treatment of amoebiasis?

<p>7-10 days (D)</p> Signup and view all the answers

What is the difference between tinidazole and metronidazole?

<p>Tinidazole has a longer duration of action and better tolerability (B)</p> Signup and view all the answers

Which fluoroquinolone is the prototype drug?

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

What type of bacteria is Ciprofloxacin highly effective against?

<p>Aerobic gram-negative organisms (A)</p> Signup and view all the answers

Which of the following anaerobes is resistant to Ciprofloxacin?

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

What is the main route of excretion for Ciprofloxacin?

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

What is a common adverse effect of Ciprofloxacin related to the GI tract?

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

Which of the following fluoroquinolones has increased activity against S. pneumoniae?

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

What is the significance of food on Ciprofloxacin absorption?

<p>Food delays absorption (B)</p> Signup and view all the answers

What is the mechanism of action of metronidazole?

<p>Reducing the 'Nitro' group by ferredoxins to form an active metabolite (C)</p> Signup and view all the answers

Which of the following is a therapeutic use of metronidazole in medicine?

<p>Treating H. pylori infection (D)</p> Signup and view all the answers

What is a common adverse reaction of metronidazole?

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

Why should patients avoid alcohol while taking metronidazole?

<p>To prevent a disulfiram-like reaction (C)</p> Signup and view all the answers

What is a significant drug interaction of metronidazole?

<p>Potentiating the anticoagulant effect of warfarin (A)</p> Signup and view all the answers

Why should metronidazole be avoided in pregnant women?

<p>Due to its teratogenic effects in experimental animals (B)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Browser