Antibiotics and Anti-Bacterial Agents
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Questions and Answers

What is the definition of an antibiotic?

  • An immunological product used to boost the body's immune system
  • A substance produced by one microorganism that inhibits the growth of other microorganisms at low concentrations (correct)
  • A chemical compound used for preserving food
  • A substance that kills microorganisms at high concentrations

    • Who demonstrated that the red azo dye prontosil could cure streptococcal infections in human beings?

  • Domagk (correct)
  • The priests
  • Paul Ehrlich
  • The ancient Egyptians

    • What category does disinfectants and antiseptics fall under?

  • Chemotherapeutic agents
  • Non-antibiotic antimicrobial agents (correct)
  • Immunological products
  • Antibiotics

    • What was the historical use of natural antimicrobial compounds of plant origin?

    <p>To treat malaria</p> Signup and view all the answers

    What is the classification of antimicrobial agents according to the text?

    <p>Antibiotics, chemotherapeutic agents, non-antibiotic antimicrobial agents, environmental products</p> Signup and view all the answers

    Who used the organic arsenical compound (arsphenamine) for the treatment of syphilis?

    <p>Paul Ehrlich</p> Signup and view all the answers

    Which milestone in antimicrobial therapy began with the observation of Fleming after the second world war?

    <p>Observation of mold contaminant inhibiting staphylococci growth</p> Signup and view all the answers

    What is the property of an ideal antibiotic defined as the toxic dose divided by the therapeutic dose?

    <p>Selectively toxic to the microbe but non toxic to eukaryotic cell</p> Signup and view all the answers

    Which classification of antimicrobial agents includes antibiotics obtained naturally from microorganisms, fungi, and bacteria?

    <p>Classification according to source and nature</p> Signup and view all the answers

    Which group of antimicrobial agents includes penicillins, cephalosporins, and clavams?

    <p>β-lactams</p> Signup and view all the answers

    Which type of antimicrobial agents is used internally for respiratory tract infections?

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

    Who produced benzyl penicillin on an industrial scale after the observation of Fleming?

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

    Which antibiotic property is defined as being bactericidal rather than bacteriostatic?

    <p>Is bactericidal rather than bacteriostatic</p> Signup and view all the answers

    'Streptomyces spp.' is associated with the production of which type of antibiotics?

    <p>'Natural' antibiotics obtained from microorganisms</p> Signup and view all the answers

    'Ampicillin and cloxacillin' are examples of which type of antibiotics?

    <p>'Semi synthetic' antibiotics</p> Signup and view all the answers

    'Imidazole derivatives' include which antibiotic?

    <p>'Metronidazole'</p> Signup and view all the answers

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