Pediatric Antibiotic Dosage Calculation
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Questions and Answers

What is the main mechanism of action of penicillin against bacteria?

  • Inhibiting the formation of bacterial ribosomes
  • Interfering with the replication of bacterial DNA
  • Disrupting the function of bacterial cell membrane proteins
  • Preventing the bonding of cross-linked peptides in the bacterial cell wall (correct)

What component is necessary for the biological activity of penicillins?

  • Beta-lactam ring (correct)
  • Side chain
  • B-lactam antibiotic
  • Thiazolidine ring

How does bacteria develop resistance to penicillin?

  • By producing an enzyme called penicillinase to inactivate penicillin (correct)
  • By reducing the permeability of the bacterial cell membrane
  • By enhancing the efficiency of cross-linking peptides in the cell wall
  • By increasing the production of bacterial ribosomes

What is the primary adverse reaction associated with penicillins?

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

What determines the antibacterial spectrum and susceptibility to degradation of penicillins?

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

What is the percentage of reported allergy to penicillin?

<p>10% (B)</p> Signup and view all the answers

What is the risk of cross-reactivity between penicillin and cephalosporin?

<p>~2% (C)</p> Signup and view all the answers

In the context of penicillin allergy, what is the significance of nonallergic symptoms such as GI symptoms?

<p>They suggest a low risk history of allergy (A)</p> Signup and view all the answers

What is the recommended action for a patient with a moderate risk history of allergic reaction to penicillin and urticaria or other pruritic rashes?

<p>Skin testing with penicillin (D)</p> Signup and view all the answers

Which type of penicillin is effective against Gram-positive bacteria and is available in oral form?

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

What is the role of clavulanate in Amoxicillin and clavulanate (Augmentin)?

<p>It protects the penicillin component from inactivation by penicillinase or B-lactamase (B)</p> Signup and view all the answers

What type of bacteria does dicloxacillin target?

<p>Gram-positive bacteria (A)</p> Signup and view all the answers

What is the main difference between Amoxicillin and clavulanate and Dicloxacillin?

<p>Amoxicillin and clavulanate target Gram-negative bacteria, while Dicloxacillin targets Gram-positive bacteria (D)</p> Signup and view all the answers

What is the function of penicillins with extended spectra of activity such as Amoxicillin and clavulanate?

<p>Inhibition of cell wall synthesis (C)</p> Signup and view all the answers

What is the role of a B-lactamase inhibitor like clavulanate in antibiotics?

<p>To protect the antibiotic from inactivation by penicillinase or B-lactamase (B)</p> Signup and view all the answers

Which antibiotic is known for frequently causing toxic effects and therefore not used often?

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

Why does Bacitracin come in an ointment instead of a solution?

<p>It has better stability in an ointment. (B)</p> Signup and view all the answers

Which antibiotic is commonly associated with MRSA (Methicillin-resistant Staphylococcus aureus)?

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

Which antibiotic belongs to the penicillin class and is combined with clavulanate to enhance its effectiveness?

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

Which antibiotic inhibits bacterial cell wall synthesis and is commonly used to treat various infections?

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

What is the main mechanism of action for cephalosporins?

<p>Disruption of bacterial cell wall synthesis (B)</p> Signup and view all the answers

Among the different generations of cephalosporins, which generation exhibits greater efficacy against resistant organisms?

<p>4th generation (C)</p> Signup and view all the answers

What is the spectrum of activity for cephalosporins?

<p>Both Gram-positive and Gram-negative bacteria (D)</p> Signup and view all the answers

What is the main method of resistance to cephalosporins?

<p>Metabolic degradation by enzymes like B-lactamases (D)</p> Signup and view all the answers

Which adverse reaction is more likely to be seen with cephalosporins?

<p>All of the above (D)</p> Signup and view all the answers

Which penicillin is resistant to penicillinase and is NOT inactivated by bacterial penicillinase enzyme?

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

What is the clinical use of dicloxacillin?

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

What is the recommended dose of dicloxacillin for internal hordeolum treatment?

<p>250mg q6h (D)</p> Signup and view all the answers

What is the appropriate dosage of amoxicillin/clavulanate for a 56 lb child?

<p>400mg/57mg po BID (C)</p> Signup and view all the answers

What is the calculated daily dose of amoxicillin for the 56 lb child?

<p>762mg (B)</p> Signup and view all the answers

What is the purpose of adding clavulanate to amoxicillin?

<p>To protect amoxicillin from beta lactamase-producing bacteria (C)</p> Signup and view all the answers

What role does clavulanate play in the combination drug Augmentin?

<p>It protects amoxicillin from degradation by enzymes (A)</p> Signup and view all the answers

For which condition is amoxicillin/clavulanate recommended as a treatment according to the text?

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

What is the recommended dose of amoxicillin/clavulanate for an adult with preseptal cellulitis?

<p>875/125 mg q12h (B)</p> Signup and view all the answers

What enzyme inactivates amoxicillin and is protected by clavulanate?

<p>Beta-lactamase (D)</p> Signup and view all the answers

In what form is Augmentin available?

<p>Both tablets and liquid suspension (A)</p> Signup and view all the answers

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