Antibacterial Classification and Action Quiz
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Questions and Answers

What is the definition of antimicrobials?

  • Medications that target fungi and protozoa exclusively
  • Substances that kill or inhibit the growth of bacteria, mycoplasma, viruses, fungi, and protozoa (correct)
  • Chemicals that damage host cells to eliminate bacteria
  • Drugs that inhibit the growth of viruses only

    • What differentiates Antibacterial Drugs from Antibiotic Drugs?

  • Antibiotics are produced by microorganisms, whereas antibacterial drugs are not
  • Antibacterial drugs specifically target viruses
  • Antibacterial drugs are always synthetic
  • Antibiotics are substances that specifically kill bacteria with minimal harm to host cells (correct)

    • Which bacterial strains are mentioned in the text?

  • Staphylococcus, Streptococcus, Escherichia coli (correct)
  • Clostridium, Pseudomonas, Mycoplasma
  • Salmonella, Clostridium, Escherichia coli
  • Staphylococcus, Mycoplasma, Salmonella

    • What does the Disc Diffusion Sensitivity Test determine?

    <p>The extent of bacterial sensitivity to an antibiotic</p> Signup and view all the answers

    If 64 colonies are present in a plate of 1/1,000 dilution, what is the bacterial count in the sample?

    <p>$640$ bacteria/ml</p> Signup and view all the answers

    Which term best describes the relationship between Lincomycin and Spectinomycin?

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

    What is the result of combining Bacteriostatic and Bactericidal antibiotics?

    <p>Less effective treatment</p> Signup and view all the answers

    Why are human cells not affected by antibiotics due to selective toxicity?

    <p>Human cells lack a cell wall</p> Signup and view all the answers

    Which factor contributes to the selective toxicity of antibiotics?

    <p>Absence of cell wall in bacterial cells</p> Signup and view all the answers

    What type of antibiotic resistance occurs when bacteria change the permeability of their cell membrane?

    <p>Acquired resistance</p> Signup and view all the answers

    Why is Streptomycin ineffective against Gram-positive bacteria?

    <p>It cannot penetrate the cell wall of Gram-positive bacteria</p> Signup and view all the answers

    Which of the following is a goal of combining antibiotics?

    <p>Widen the spectrum of activity</p> Signup and view all the answers

    Which two antibiotics are combined to achieve synergistic effect by increasing efficacy?

    <p>Spiramycin + Neomycin</p> Signup and view all the answers

    In antibiotic combination, which pair achieves a 1+1=2 increase in efficacy?

    <p>Spiramycin + Colistin</p> Signup and view all the answers

    What type of killers do Aminoglycosides, Penicillins, and Fluoroquinolones fall under?

    <p>Concentration dependent killers</p> Signup and view all the answers

    Which antibiotic combination does NOT follow the rules of bactericide + bactericide synergism?

    <p>Amoxicillin + Colistin on E.</p> Signup and view all the answers

    What is the main purpose of combining antibiotics according to the text?

    <p>To avoid incidence of bacterial resistance</p> Signup and view all the answers

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