Antibacterials I Introduction to Antimicrobial Chemotherapy

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Questions and Answers

What is a key reason for infectious diseases that were once considered incurable becoming curable?

  • Inhibition of viral replication
  • Inhibition of bacterial ribosomes (correct)
  • Inhibition of fungal cell wall synthesis
  • Inhibition of eukaryotic DNA synthesis

Which region had the highest death rate associated with Antibiotic Resistance in 2019 according to the text?

  • Western sub-Saharan Africa (correct)
  • Western Europe
  • North America
  • Australia

Which of the following is not one of the six leading pathogens mentioned in the text?

  • Klebsiella pneumoniae
  • Acinetobacter baumannii
  • Streptococcus pyogenes (correct)
  • Escherichia coli

Which antibiotic was mentioned as the most prescribed in the community in 2021?

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

How many unnecessary antibiotic prescriptions were estimated to have been given in 2021?

<p>~20 million (A)</p> Signup and view all the answers

What amount was spent on treating the six leading infections in 2021 according to Nelson et al.?

<p>$4.6 billion (C)</p> Signup and view all the answers

What is the main difference between static and cidal antimicrobial activity?

<p>Static activity causes irreversible loss of ability to reproduce, while cidal activity causes reversible loss of ability to reproduce. (C)</p> Signup and view all the answers

Which type of drug absorption is influenced by factors such as chemistry and intestinal transit time?

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

Which body organ is primarily responsible for the excretion of drugs like penicillin, vancomycin, and cephalosporins?

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

What principle of pharmacokinetics explains the phenomenon of competing similar molecules delaying drug elimination?

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

In the context of antimicrobials, what does MIC stand for?

<p>Minimal Inhibitory Concentration (D)</p> Signup and view all the answers

Which type of antimicrobial activity results in continuing antibacterial effects even after drug removal?

<p>Post-Antibiotic Effect (A)</p> Signup and view all the answers

What is the primary function of pharmacodynamics in the context of antimicrobials?

<p>Interaction of drug with target bacterium (A)</p> Signup and view all the answers

Which factor influences the amount absorbed in oral doses?

<p>Intestinal transit time (D)</p> Signup and view all the answers

Which type of absorption method results in poor penetration into eyes, prostate, and CNS for penicillin?

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

What is the influence of protein binding on drug interactions according to pharmacokinetics?

<p>Only drugs free from protein binding can interact with pathogens (B)</p> Signup and view all the answers

Which of the following is considered a concerning threat according to the text?

<p>Erythromycin-resistant Group A Streptococcus (A)</p> Signup and view all the answers

What is one of the sources for antibacterials mentioned in the text?

<p>Semi-synthetic (C)</p> Signup and view all the answers

Which pathogen has the potential to be treated by 19 of the antibacterial agents mentioned in the text?

<p>Multidrug-resistant Pseudomonas aeruginosa (C)</p> Signup and view all the answers

What do companies need in terms of return to invest in a new drug?

<p>$200 million a year (B)</p> Signup and view all the answers

Which phase includes small clinical trials in humans to collect initial data on efficacy and safety?

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

What is the concern regarding antibiotic development costs according to the text?

<p>$65 million is not enough return for companies investing in antibiotics (C)</p> Signup and view all the answers

Which issue does One Health emphasize according to the text?

<p>Health linkages among humans, animals, and the environment (B)</p> Signup and view all the answers

What global issue facilitates the worldwide spread of antimicrobial resistance that occurs locally?

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

Which bacterial pathogen resistant to antibiotic drugs is threatening our ability to treat patients according to the text?

<p>Methicillin-resistant Staphylococcus aureus (MRSA) (D)</p> Signup and view all the answers

What is the purpose of Investigational New Drug Application (IND) mentioned in the text?

<p>Approval prior to clinical trials to ensure safety (A)</p> Signup and view all the answers

What is the gold standard for evaluating pharmacokinetic/pharmacodynamic antibiotics?

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

Which of the following PK/PD indices represents the cumulative percentage of a 24-hour period that the antibiotic concentration is above the MIC?

<p>T&gt;MIC (D)</p> Signup and view all the answers

What parameter is used to classify if a drug is bacteriostatic or bactericidal?

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

Which drug class is associated with a high post-antibiotic effect (PAE)?

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

What is the purpose of Monte Carlo Simulation in pharmacodynamics studies?

<p>To generate random PK and MIC values (C)</p> Signup and view all the answers

Which pharmacodynamic parameter involves the area under the concentration-time curve of an antibiotic?

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

What is the Post-Antibiotic Effect (PAE) defined as?

<p>Continued activity of antibiotic after it is removed (B)</p> Signup and view all the answers

Which factor does NOT influence the Post-Antibiotic Effect (PAE) according to the text?

<p>Presence of host response (B)</p> Signup and view all the answers

Which type of antibiotics display prolonged Post-Antibiotic Effect (PAE) against susceptible organisms?

<p>Nucleic acid synthesis inhibitors (B)</p> Signup and view all the answers

What do Clinical Breakpoints help determine in relation to antibiotic therapy?

<p>The probability of a cure based on dosing regimen (D)</p> Signup and view all the answers

What is the primary challenge highlighted in the text regarding Gram-negative resistance?

<p>Diminished antibiotic discovery programs (D)</p> Signup and view all the answers

What is recommended by the CDC for all hospitals in response to antibiotic stewardship?

<p>Implementation of Infection Control programs (C)</p> Signup and view all the answers

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