week 8
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Questions and Answers

What is the primary factor to consider when selecting antibiotic treatment?

  • Susceptibility of the organism to a given microbial agent
  • Client factors
  • Cost of the therapy
  • Identity of the organism (correct)
  • Which type of bacteria has a thicker layer of peptidoglycan and no outer lipid layer?

  • Bacterial Vaginosis
  • Lactation
  • Gram Negative
  • Gram Positive (correct)
  • What makes Gram negative bacteria more resistant to certain antibiotics?

  • Thicker layer of peptidoglycan
  • Presence of LPS in the outer lipid layer (correct)
  • Absence of an outer lipid layer
  • Staining pink in Gram stain
  • What legislation allows midwives to prescribe drugs for various conditions?

    <p>Midwifery Drug Legislation 884/93</p> Signup and view all the answers

    What is the primary purpose of the All Purpose Nipple Ointment mentioned in the text?

    <p>Treatment of nipple pain</p> Signup and view all the answers

    What is the main factor influencing the selection of antibiotic treatment according to the text?

    <p>Identity of the organism</p> Signup and view all the answers

    Which condition is NOT mentioned as one for which midwives may prescribe drugs?

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

    What is the primary factor influencing the susceptibility of the organism to a given microbial agent?

    <p>Identity of the organism</p> Signup and view all the answers

    What type of bacteria has an outer lipid layer that makes it harder for antibiotics to penetrate?

    <p>Gram Negative</p> Signup and view all the answers

    What is the main factor influencing the safety of the agent when selecting antibiotic treatment?

    <p>Susceptibility of the organism to a given microbial agent</p> Signup and view all the answers

    Which of the following is a common cause of mastitis?

    <p>Blocked milk ducts</p> Signup and view all the answers

    What organism almost always causes bacterial breast infection leading to mastitis?

    <p>Staphylococcus aureus</p> Signup and view all the answers

    Which type of milk is associated with infected breast milk in the case of mastitis?

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

    What is the onset of symptoms for mastitis?

    <p>Gradual - usually from d3-d5 postpartum</p> Signup and view all the answers

    What is the location of inflammation in the case of mastitis?

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

    What is the characteristic of pain experienced in mastitis?

    <p>Intense and diffuse</p> Signup and view all the answers

    What is the common cause of unresolved engorgement or plugged duct in mastitis?

    <p>Improper latching</p> Signup and view all the answers

    What may lead to an abscess that needs to be surgically drained if left untreated in mastitis?

    <p>Bacterial breast infection</p> Signup and view all the answers

    What is the characteristic of heat in the affected area in mastitis?

    <p>Intense heat</p> Signup and view all the answers

    What may be the cause of infections that don’t resolve with antibiotics within 24h in mastitis?

    <p>Candida albicans</p> Signup and view all the answers

    Which type of bacteria are associated with bacterial vaginosis?

    <p>Gram-variable bacteria</p> Signup and view all the answers

    What is a key factor contributing to the emergence of 'superbugs' like MRSA?

    <p>Rapidly increasing antibiotic resistance</p> Signup and view all the answers

    What is a recommended way to avoid antibiotic resistance?

    <p>Appropriate use of antibiotics and completing the entire course of treatment</p> Signup and view all the answers

    What is essential for determining the most effective antibiotic for treatment?

    <p>Culture and sensitivity tests</p> Signup and view all the answers

    What are the mechanisms of antibiotic resistance?

    <p>Enzymatic inactivation of antibiotics, decreased antibiotic uptake, increased antibiotic efflux, and modification of antibiotic targets</p> Signup and view all the answers

    What are the two main types of antibiotic action?

    <p>Bacteriocidal and bacteriostatic</p> Signup and view all the answers

    Which type of antibiotics inhibit cell wall synthesis by targeting the peptidoglycan cell wall?

    <p>Penicillin G, amoxicillin, and cephalosporins</p> Signup and view all the answers

    Which antibiotics bind to the 50s ribosomal subunit, preventing translocation of amino acids?

    <p>Clindamycin and erythromycin</p> Signup and view all the answers

    Which enzymes do DNA synthesis inhibitors like fluoroquinolones target?

    <p>DNA gyrase</p> Signup and view all the answers

    What do bacteria use to make their own folic acid?

    <p>P-aminobenzoic acid (PABA)</p> Signup and view all the answers

    What is the primary factor influencing the selection of antibiotic treatment?

    <p>Identity of the organism</p> Signup and view all the answers

    What is the characteristic of heat in the affected area in mastitis?

    <p>Warm to the touch</p> Signup and view all the answers

    Which type of bacteria are associated with bacterial vaginosis?

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

    What is the common cause of unresolved engorgement or plugged duct in mastitis?

    <p>Yeast Infection</p> Signup and view all the answers

    What do bacteria use to make their own folic acid?

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

    What is the main factor influencing the safety of the agent when selecting antibiotic treatment?

    <p>Client factors</p> Signup and view all the answers

    What is the primary purpose of the All Purpose Nipple Ointment mentioned in the text?

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

    What is a recommended way to avoid antibiotic resistance?

    <p>Taking antibiotics only when necessary</p> Signup and view all the answers

    What is essential for determining the most effective antibiotic for treatment?

    <p>Susceptibility testing</p> Signup and view all the answers

    What is the location of inflammation in the case of mastitis?

    <p>Mammary glands</p> Signup and view all the answers

    What is the characteristic of pain experienced in mastitis?

    <p>Intense but often diffuse</p> Signup and view all the answers

    What is the onset of symptoms for mastitis?

    <p>Sudden – from 7d to several weeks postpartum</p> Signup and view all the answers

    What organism almost always causes bacterial breast infection leading to mastitis?

    <p>Staphylococcus aureus</p> Signup and view all the answers

    Which type of milk is associated with infected breast milk in the case of mastitis?

    <p>Green milk</p> Signup and view all the answers

    What may lead to an abscess that needs to be surgically drained if left untreated in mastitis?

    <p>Bacterial breast infection</p> Signup and view all the answers

    Which of the following is a common cause of mastitis?

    <p>Improper latching</p> Signup and view all the answers

    What may be the cause of infections that don’t resolve with antibiotics within 24h in mastitis?

    <p>Candida albicans infection</p> Signup and view all the answers

    What is a recommended way to avoid antibiotic resistance?

    <p>Using antibiotics only when necessary</p> Signup and view all the answers

    What is the location of inflammation in the case of mastitis?

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

    What type of bacteria has a thicker layer of peptidoglycan and no outer lipid layer?

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

    Which of the following is a method to avoid antibiotic resistance?

    <p>Completing the entire course of antibiotic treatment</p> Signup and view all the answers

    What is the primary target of protein synthesis inhibitors like clindamycin and erythromycin?

    <p>50s ribosomal subunit</p> Signup and view all the answers

    What is the primary mechanism of antibiotic resistance due to alterations in bacterial DNA?

    <p>Horizontal gene transfer</p> Signup and view all the answers

    Which type of bacteria are associated with bacterial vaginosis?

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

    Which enzyme do DNA synthesis inhibitors like fluoroquinolones target?

    <p>DNA gyrase</p> Signup and view all the answers

    What is the primary characteristic of bacteriostatic antibiotics?

    <p>They stop the growth or division of bacteria</p> Signup and view all the answers

    Which antibiotics inhibit cell wall synthesis by targeting the peptidoglycan cell wall?

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

    What is the primary cause of the emergence of 'superbugs' like MRSA?

    <p>Overuse of broad-spectrum antibiotics</p> Signup and view all the answers

    What is the primary target of fluoroquinolones, a type of DNA synthesis inhibitor?

    <p>DNA gyrase</p> Signup and view all the answers

    What is the primary purpose of culture and sensitivity tests in antibiotic treatment?

    <p>To identify the bacteria causing the infection</p> Signup and view all the answers

    What is the primary factor to consider when selecting antibiotic treatment?

    <p>Identity of the organism</p> Signup and view all the answers

    Which type of bacteria has an outer lipid layer that makes it harder for antibiotics to penetrate?

    <p>Gram-negative bacteria</p> Signup and view all the answers

    What is the primary purpose of the All Purpose Nipple Ointment mentioned in the text?

    <p>To treat nipple pain and inflammation</p> Signup and view all the answers

    What legislation allows midwives to prescribe drugs for various conditions?

    <p>Midwifery Drug Legislation 884/93</p> Signup and view all the answers

    What makes Gram-negative bacteria more resistant to certain antibiotics?

    <p>Outer lipid layer with LPS</p> Signup and view all the answers

    What is essential for determining the most effective antibiotic for treatment?

    <p>Identity of the organism</p> Signup and view all the answers

    What may lead to an abscess that needs to be surgically drained if left untreated in mastitis?

    <p>Unresolved infection</p> Signup and view all the answers

    Which enzyme do DNA synthesis inhibitors like fluoroquinolones target?

    <p>DNA gyrase/topoisomerase</p> Signup and view all the answers

    What is the primary characteristic of bacteriostatic antibiotics?

    <p>They inhibit bacterial growth</p> Signup and view all the answers

    What do bacteria use to make their own folic acid?

    <p>Dihydropteroate synthase</p> Signup and view all the answers

    What is the primary cause of mastitis?

    <p>Bacterial breast infection</p> Signup and view all the answers

    What may lead to an abscess that needs to be surgically drained if left untreated in mastitis?

    <p>Bacterial breast infection</p> Signup and view all the answers

    What is the characteristic of pain experienced in mastitis?

    <p>Intense but often diffuse</p> Signup and view all the answers

    What is the onset of symptoms for mastitis?

    <p>Gradual - from 7d to several weeks postpartum</p> Signup and view all the answers

    What type of bacteria are almost always associated with bacterial breast infection causing mastitis?

    <p>Staphylococcus aureus</p> Signup and view all the answers

    What is the common cause of unresolved engorgement or plugged duct in mastitis?

    <p>Improper latching</p> Signup and view all the answers

    Which type of milk is associated with infected breast milk in the case of mastitis?

    <p>Green liquid</p> Signup and view all the answers

    What is the characteristic of heat in the affected area in mastitis?

    <p>Hot, red, and swollen</p> Signup and view all the answers

    What is a recommended way to avoid antibiotic resistance in the context of mastitis treatment?

    <p>Proper antibiotic selection based on culture and sensitivity testing</p> Signup and view all the answers

    What may be the cause of infections that don’t resolve with antibiotics within 24 hours in mastitis?

    <p>Candida albicans</p> Signup and view all the answers

    What are the primary mechanisms of antibiotic resistance?

    <p>Enzymatic inactivation of antibiotics, decreased antibiotic uptake, increased antibiotic efflux, and modification of antibiotic targets</p> Signup and view all the answers

    Which type of antibiotics inhibit cell wall synthesis by targeting the peptidoglycan cell wall?

    <p>Penicillin G, amoxicillin, and cephalosporins</p> Signup and view all the answers

    What is the primary target of fluoroquinolones, a type of DNA synthesis inhibitor?

    <p>DNA gyrase</p> Signup and view all the answers

    What do bacteria use to make their own folic acid?

    <p>P-aminobenzoic acid (PABA)</p> Signup and view all the answers

    What are the modes of antibiotic action mentioned in the text?

    <p>Cell wall synthesis inhibitors, protein synthesis inhibitors, and DNA synthesis inhibitors</p> Signup and view all the answers

    What is the primary characteristic of bacteriostatic antibiotics?

    <p>Stopping bacterial growth or division</p> Signup and view all the answers

    What is essential for determining the most effective antibiotic for treatment?

    <p>Culture and sensitivity tests</p> Signup and view all the answers

    What may lead to an abscess that needs to be surgically drained if left untreated in mastitis?

    <p>Infections that don’t resolve with antibiotics within 24h</p> Signup and view all the answers

    What is the primary cause of the emergence of 'superbugs' like MRSA?

    <p>Rapidly increasing antibiotic resistance</p> Signup and view all the answers

    What is a recommended way to avoid antibiotic resistance?

    <p>Appropriate use of antibiotics, starting with narrow-spectrum antibiotics, and completing the entire course of treatment</p> Signup and view all the answers

    What percentage of breastfeeding women experience infective mastitis?

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

    Why is mastitis typically assumed to be of bacterial origin?

    <p>It is difficult to distinguish between infective and noninfective mastitis</p> Signup and view all the answers

    What is the primary treatment for infective mastitis?

    <p>Oral antibiotics</p> Signup and view all the answers

    Why is breastfeeding encouraged during mastitis treatment?

    <p>To prevent milk stasis</p> Signup and view all the answers

    When is breastfeeding not encouraged during mastitis treatment?

    <p>When the mother is at less than three months postpartum</p> Signup and view all the answers

    What is Amoxicillin–Clavulanic Acid?

    <p>A combination of penicillin and clavulanic acid</p> Signup and view all the answers

    Why is culturing of milk considered difficult?

    <p>Milk has normal colonization of bacteria</p> Signup and view all the answers

    When would therapy for infective mastitis likely commence?

    <p>Before the laboratory results of the culture and sensitivity tests are received</p> Signup and view all the answers

    When is culturing of milk useful in mastitis treatment?

    <p>When antibiotic resistance is possible</p> Signup and view all the answers

    What is a key part of mastitis treatment?

    <p>Frequent draining of the breast through feeding or pumping</p> Signup and view all the answers

    Why is it difficult to distinguish between infective and noninfective mastitis?

    <p>They have similar symptoms</p> Signup and view all the answers

    What is the primary cause of mastitis?

    <p>Bacterial infection</p> Signup and view all the answers

    Which antibiotic may be used as an alternative if clindamycin cannot be used for infective mastitis treatment?

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

    What is the primary source of bacterial resistance in infective mastitis, justifying the use of clavulanic acid with amoxicillin?

    <p>β-lactamase made by Staphylococcus</p> Signup and view all the answers

    What is the contraindication associated with sulfamethoxazole-trimethoprim in the context of infective mastitis treatment?

    <p>Contraindicated during the first three months of breastfeeding</p> Signup and view all the answers

    What is the primary factor that justifies the use of clavulanic acid in combination with amoxicillin for infective mastitis treatment?

    <p>Extended spectrum of amoxicillin</p> Signup and view all the answers

    Which antibiotic is a suitable alternative for patients allergic to penicillins in the context of infective mastitis treatment?

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

    What is the primary factor that justifies the use of cloxacillin for infective mastitis treatment?

    <p>Resistance to β-lactamase</p> Signup and view all the answers

    In which situation is Clindamycin a preferred option for infective mastitis treatment?

    <p>Patients with serious hypersensitivity reactions to β-lactam antibiotics</p> Signup and view all the answers

    What is the primary characteristic of All Purpose Nipple Ointment (APNO) used for nipple infections in the context of mastitis treatment?

    <p>Contains mupirocin, betamethasone valerate, and miconazole</p> Signup and view all the answers

    Which antibiotic is mentioned as more effective than erythromycin for infective mastitis treatment?

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

    What is the primary characteristic of Cephalexin in the context of infective mastitis treatment?

    <p>First-generation oral cephalosporin</p> Signup and view all the answers

    What is the primary factor that justifies the use of amoxicillin monotherapy for infective mastitis treatment?

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

    What is the primary reason for treating mastitis as of bacterial origin?

    <p>Due to the difficulty in distinguishing between infective and noninfective mastitis</p> Signup and view all the answers

    When is breastfeeding not encouraged during infective mastitis treatment?

    <p>When the mother is at less than three months postpartum</p> Signup and view all the answers

    What is the main reason for encouraging breastfeeding during mastitis treatment?

    <p>To reduce the risk of abscess formation in the breast</p> Signup and view all the answers

    What is the primary component of Amoxicillin–Clavulanic Acid?

    <p>Amoxicillin and clavulanic acid</p> Signup and view all the answers

    When is culturing of milk useful in infective mastitis treatment?

    <p>When antibiotic resistance is possible</p> Signup and view all the answers

    What is the characteristic of pain experienced in mastitis?

    <p>Dull, diffuse pain</p> Signup and view all the answers

    What is the common cause of unresolved engorgement or plugged duct in mastitis?

    <p>Poor breastfeeding technique</p> Signup and view all the answers

    What is the primary factor to consider when selecting antibiotic treatment for mastitis?

    <p>The severity of the infection</p> Signup and view all the answers

    What may lead to an abscess that needs to be surgically drained if left untreated in mastitis?

    <p>Untreated infection</p> Signup and view all the answers

    What is the primary characteristic of Cephalexin in the context of infective mastitis treatment?

    <p>It is safe for breastfeeding mothers</p> Signup and view all the answers

    What is the primary cause of infective mastitis?

    <p>Bacterial infection</p> Signup and view all the answers

    What is the primary reason for treating infective mastitis with oral antibiotics before receiving culture and sensitivity test results?

    <p>Due to the difficulty in distinguishing between infective and noninfective mastitis</p> Signup and view all the answers

    Which antibiotic is often used in combination with clavulanic acid to treat infective mastitis?

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

    What is the main source of bacterial resistance in infective mastitis, justifying the use of clavulanic acid?

    <p>β-lactamase made by Staphylococcus</p> Signup and view all the answers

    Which antibiotic can be used as an alternative for patients allergic to penicillins in the context of infective mastitis treatment?

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

    Which antibiotic is used to treat infective mastitis when there are serious hypersensitivity reactions to β-lactam antibiotics?

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

    Which antibiotic may be effective for antibiotic-resistant Staphylococcus aureus infective mastitis, but is contraindicated during the first three months of breastfeeding?

    <p>Sulfamethoxazole-trimethoprim</p> Signup and view all the answers

    What is the primary characteristic of amoxicillin in the context of infective mastitis treatment?

    <p>Extended-spectrum penicillin</p> Signup and view all the answers

    What is the primary characteristic of cloxacillin in the context of infective mastitis treatment?

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

    What is the primary characteristic of cephalexin in the context of infective mastitis treatment?

    <p>First-generation oral cephalosporin</p> Signup and view all the answers

    What is the primary reason for using clindamycin to treat infective mastitis?

    <p>Serious hypersensitivity reactions to β-lactam antibiotics</p> Signup and view all the answers

    What is the primary reason for not using ciprofloxacin as the preferred choice for treating infective mastitis?

    <p>Poor activity against Staphylococcus aureus</p> Signup and view all the answers

    What is the primary characteristic of sulfamethoxazole-trimethoprim in the context of infective mastitis treatment?

    <p>Contraindicated during the first three months of breastfeeding</p> Signup and view all the answers

    Which type of bacteria has an outer lipid layer that makes it harder for antibiotics to penetrate?

    <p>Gram-negative</p> Signup and view all the answers

    What is the most common mechanism of antibiotic resistance?

    <p>Enzymatic inactivation of antibiotic</p> Signup and view all the answers

    How do Gram-negative organisms resist some antibiotics?

    <p>Decrease number of porins</p> Signup and view all the answers

    Which type of gene transfer involves bacteriophages?

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

    What is the primary way in which drug resistance genes are often coded?

    <p>Plasmid DNA</p> Signup and view all the answers

    Which antibiotic resistance mechanism involves energy-dependent pumps transporting the drug out of cells?

    <p>Increased antibiotic efflux</p> Signup and view all the answers

    Which type of bacteria stains pink in the Gram stain?

    <p>Gram-negative</p> Signup and view all the answers

    What type of gene transfer involves pieces of DNA taken up from the external environment?

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

    Which antibiotic resistance mechanism involves receptors for drugs, target molecules, and enzymes being modified?

    <p>Modification of antibiotic targets</p> Signup and view all the answers

    What is the primary characteristic of Gram-positive bacteria?

    <p>Thick layer of peptidoglycan</p> Signup and view all the answers

    Which antibiotic inhibits the formation of peptide cross-bridges in the peptidoglycan cell wall of bacteria?

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

    Which antibiotic is a prodrug that, when activated by susceptible bacteria, inhibits bacterial DNA synthesis?

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

    Which antibiotic binds at the 50s ribosomal subunit, preventing the translocation of amino acids?

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

    Which antibiotic works by inhibiting the enzyme responsible for relaxing/uncoiling DNA so it can be replicated?

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

    Which antibiotic is best for Gram+ cocci, followed by Gram- like N. gonorrheae, and then others like Treponema pallidum?

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

    Which antibiotic has similar activity to Penicillin G, plus E. coli and Klebsiella pneumoniae, and some others?

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

    Which antibiotic does not have the beta-lactam ring but is also a cell wall synthesis inhibitor?

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

    Which antibiotic is contraindicated during the first three months of breastfeeding?

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

    Which antibiotic is a beta-lactam antibiotic and is best for Gram+ cocci, followed by Gram- like N. gonorrheae, and then others like Treponema pallidum?

    <p>Penicillin G</p> Signup and view all the answers

    Which antibiotic is good for some Gram- (like bacilli) and has similar activity to Penicillin G?

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

    Which antibiotic is an intermediate spectrum antibiotic similar to Penicillin G?

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

    What is the primary characteristic of LPS in Gram-negative bacteria?

    <p>It has an outer lipid layer that makes it harder for antibiotics to penetrate</p> Signup and view all the answers

    Which type of gene transfer involves direct cell-to-cell contact via a pilus?

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

    What is the most common mechanism of antibiotic resistance?

    <p>Enzymatic Inactivation of Antibiotic</p> Signup and view all the answers

    Which mechanism of antibiotic resistance involves energy-dependent pumps transporting the drug out of cells?

    <p>Increased Antibiotic Efflux</p> Signup and view all the answers

    What is the primary characteristic of Gram-positive bacteria?

    <p>They have a thick layer of peptidoglycan</p> Signup and view all the answers

    Which type of bacteria are resistant to some antibiotics due to the inability of drugs to penetrate their outer cell membrane?

    <p>Gram-negative organisms</p> Signup and view all the answers

    Which type of bacteria are more susceptible to certain antibiotics like penicillin?

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

    Which antibiotic resistance mechanism involves the modification of antibiotic targets such as receptors, target molecules, and enzymes?

    <p>Modification of Antibiotic Targets</p> Signup and view all the answers

    What is the primary characteristic of Gram-negative bacteria in the context of Gram staining?

    <p>They have an outer lipid layer that makes them harder for antibiotics to penetrate</p> Signup and view all the answers

    Which antibiotic resistance mechanism involves bacteria making enzymes that metabolize antibiotics?

    <p>Enzymatic Inactivation of Antibiotic</p> Signup and view all the answers

    Which enzyme do beta-lactam antibiotics like penicillins and cephalosporins inhibit?

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

    Which antibiotic is a cell wall synthesis inhibitor but does not have the beta-lactam ring?

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

    Which antibiotic is best for Gram-positive cocci like Streptococcus and Staphylococcus spp?

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

    Which antibiotic inhibits DNA synthesis by getting inside bacteria via porins and inhibiting DNA gyrase?

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

    Which antibiotic is a prodrug that inhibits bacterial DNA synthesis by producing reactive intermediates when activated by susceptible bacteria?

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

    Which antibiotic binds at the 50s ribosomal subunit and inhibits the growth of peptides by preventing the translocation of amino acids?

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

    Which antibiotic is good for some Gram-negative bacteria like E. coli and Klebsiella pneumoniae, in addition to having similar activity to Penicillin G?

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

    Which antibiotic is a cell wall synthesis inhibitor that does not have the beta-lactam ring and can work against bacteria when resistance to other antibiotics has developed?

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

    Which antibiotic is best for Gram-positive cocci like Streptococcus and Staphylococcus spp, and then for Gram-negative bacteria like N. gonorrheae?

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

    Which antibiotic inhibits protein synthesis by blocking tRNA synthesis?

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

    Which antibiotic inhibits the formation of peptide cross-bridges in the peptidoglycan cell wall of bacteria?

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

    What is the primary target of beta-lactam antibiotics like penicillins and cephalosporins?

    <p>Inhibit cell wall synthesis</p> Signup and view all the answers

    Which antibiotic is a cell wall synthesis inhibitor and is effective against Gram-positive cocci like Streptococcus and Staphylococcus species?

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

    Which antibiotic inhibits DNA synthesis by targeting DNA gyrase, the enzyme responsible for relaxing/uncoiling DNA in bacteria?

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

    Which antibiotic blocks protein synthesis by binding at the 50s ribosomal subunit and preventing the translocation of amino acids?

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

    Which antibiotic is not a beta-lactam antibiotic but still functions as a cell wall synthesis inhibitor and can work against antibiotic-resistant bacteria?

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

    Which enzyme do fluoroquinolones like ciprofloxacin inhibit to prevent bacterial DNA synthesis?

    <p>DNA gyrase</p> Signup and view all the answers

    Which antibiotic is preferred for infective mastitis treatment due to its activity against Gram-positive cocci and some Gram-negative bacteria like E. coli and Klebsiella pneumoniae?

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

    Which antibiotic is a protein synthesis inhibitor that works by blocking tRNA synthesis?

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

    Which antibiotic is a prodrug that, when activated, inhibits bacterial DNA synthesis by producing reactive intermediates with multiple functions?

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

    Which class of antibiotics inhibits the formation of the peptide cross-bridges in the peptidoglycan cell wall of bacteria?

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

    Which antibiotic is suitable for infective mastitis treatment and is a cell wall synthesis inhibitor that does not have the beta-lactam ring?

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

    What is the primary difference between Gram-negative and Gram-positive bacteria in terms of cell wall structure?

    <p>Gram-negative bacteria have a thin layer of peptidoglycan and an outer lipid layer, while Gram-positive bacteria have a thick layer of peptidoglycan but no outer lipid layer.</p> Signup and view all the answers

    Which mechanism of antibiotic resistance involves bacteria making enzymes that metabolize antibiotics?

    <p>Enzymatic inactivation of antibiotic</p> Signup and view all the answers

    How do Gram-negative organisms resist some antibiotics?

    <p>By decreasing the number of porins, which reduces antibiotic uptake</p> Signup and view all the answers

    In which type of gene transfer are pieces of DNA taken up from the external environment?

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

    What is the primary way in which drug resistance genes are often coded?

    <p>On plasmid DNA</p> Signup and view all the answers

    Which antibiotic resistance mechanism involves energy-dependent pumps transporting the drug out of cells?

    <p>Increased antibiotic efflux</p> Signup and view all the answers

    Which antibiotic is an example of a β-lactamase inhibitor?

    <p>Clavulanic acid</p> Signup and view all the answers

    What is the primary method of gene transfer when bacteriophages perform the gene transfer?

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

    Which antibiotic inhibits protein synthesis by blocking tRNA synthesis?

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

    What is the most common mechanism by which microbes become antibiotic resistant?

    <p>Taking on DNA from another, drug-resistant strain</p> Signup and view all the answers

    Study Notes

    Understanding Antibiotic Resistance

    • Gram-variable bacteria like Mobiluncus spp. and Gardnerella vaginalis are associated with bacterial vaginosis.
    • Antibiotic resistance is rapidly increasing, leading to the emergence of "superbugs" such as MRSA.
    • Ways to avoid antibiotic resistance include appropriate use of antibiotics, starting with narrow-spectrum antibiotics, and completing the entire course of treatment.
    • Culture and sensitivity tests are essential for determining the most effective antibiotic for treatment.
    • Antibiotic resistance occurs due to alterations in bacterial DNA, including mutations and horizontal gene transfer.
    • Resistance mechanisms include enzymatic inactivation of antibiotics, decreased antibiotic uptake, increased antibiotic efflux, and modification of antibiotic targets.
    • Antibiotics can be bacteriocidal, directly killing bacteria, or bacteriostatic, stopping their growth or division.
    • Modes of antibiotic action include cell wall synthesis inhibitors like beta-lactam antibiotics, protein synthesis inhibitors, and DNA synthesis inhibitors like fluoroquinolones.
    • Antibiotics such as penicillin G, amoxicillin, and cephalosporins inhibit cell wall synthesis by targeting the peptidoglycan cell wall.
    • Protein synthesis inhibitors like clindamycin and erythromycin bind to the 50s ribosomal subunit, preventing translocation of amino acids.
    • DNA synthesis inhibitors, such as fluoroquinolones, inhibit DNA synthesis by targeting enzymes like DNA gyrase.
    • Folate synthesis inhibitors target the same principle as in humans, but bacteria make their own folic acid using p-aminobenzoic acid (PABA).

    Understanding Antibiotic Resistance

    • Gram-variable bacteria like Mobiluncus spp. and Gardnerella vaginalis are associated with bacterial vaginosis.
    • Antibiotic resistance is rapidly increasing, leading to the emergence of "superbugs" such as MRSA.
    • Ways to avoid antibiotic resistance include appropriate use of antibiotics, starting with narrow-spectrum antibiotics, and completing the entire course of treatment.
    • Culture and sensitivity tests are essential for determining the most effective antibiotic for treatment.
    • Antibiotic resistance occurs due to alterations in bacterial DNA, including mutations and horizontal gene transfer.
    • Resistance mechanisms include enzymatic inactivation of antibiotics, decreased antibiotic uptake, increased antibiotic efflux, and modification of antibiotic targets.
    • Antibiotics can be bacteriocidal, directly killing bacteria, or bacteriostatic, stopping their growth or division.
    • Modes of antibiotic action include cell wall synthesis inhibitors like beta-lactam antibiotics, protein synthesis inhibitors, and DNA synthesis inhibitors like fluoroquinolones.
    • Antibiotics such as penicillin G, amoxicillin, and cephalosporins inhibit cell wall synthesis by targeting the peptidoglycan cell wall.
    • Protein synthesis inhibitors like clindamycin and erythromycin bind to the 50s ribosomal subunit, preventing translocation of amino acids.
    • DNA synthesis inhibitors, such as fluoroquinolones, inhibit DNA synthesis by targeting enzymes like DNA gyrase.
    • Folate synthesis inhibitors target the same principle as in humans, but bacteria make their own folic acid using p-aminobenzoic acid (PABA).

    Understanding Antibiotic Resistance

    • Gram-variable bacteria like Mobiluncus spp. and Gardnerella vaginalis are associated with bacterial vaginosis.
    • Antibiotic resistance is rapidly increasing, leading to the emergence of "superbugs" such as MRSA.
    • Ways to avoid antibiotic resistance include appropriate use of antibiotics, starting with narrow-spectrum antibiotics, and completing the entire course of treatment.
    • Culture and sensitivity tests are essential for determining the most effective antibiotic for treatment.
    • Antibiotic resistance occurs due to alterations in bacterial DNA, including mutations and horizontal gene transfer.
    • Resistance mechanisms include enzymatic inactivation of antibiotics, decreased antibiotic uptake, increased antibiotic efflux, and modification of antibiotic targets.
    • Antibiotics can be bacteriocidal, directly killing bacteria, or bacteriostatic, stopping their growth or division.
    • Modes of antibiotic action include cell wall synthesis inhibitors like beta-lactam antibiotics, protein synthesis inhibitors, and DNA synthesis inhibitors like fluoroquinolones.
    • Antibiotics such as penicillin G, amoxicillin, and cephalosporins inhibit cell wall synthesis by targeting the peptidoglycan cell wall.
    • Protein synthesis inhibitors like clindamycin and erythromycin bind to the 50s ribosomal subunit, preventing translocation of amino acids.
    • DNA synthesis inhibitors, such as fluoroquinolones, inhibit DNA synthesis by targeting enzymes like DNA gyrase.
    • Folate synthesis inhibitors target the same principle as in humans, but bacteria make their own folic acid using p-aminobenzoic acid (PABA).

    Treatment Options for Infective Mastitis

    • Amoxicillin is often used in combination with the β-lactamase inhibitor clavulanic acid to treat infective mastitis, as it is an extended-spectrum penicillin.
    • The addition of clavulanic acid extends the spectrum of amoxicillin, although it may increase the likelihood of gastrointestinal upset.
    • Amoxicillin monotherapy is often effective, but the main source of bacterial resistance is a β-lactamase made by Staphylococcus, justifying the use of clavulanic acid.
    • Cloxacillin, a penicillin that is β-lactamase resistant and has a narrow spectrum of action, can also be used to treat mastitis.
    • Cephalexin, a first-generation oral cephalosporin, is a suitable alternative for patients allergic to penicillins, with a moderately broad spectrum of action.
    • Clindamycin is an option for individuals with serious hypersensitivity reactions to β-lactam antibiotics, although it may cause more gastrointestinal side effects.
    • Ciprofloxacin may be used as an alternative if clindamycin cannot be used, but it is not the preferred choice due to its poor activity against Staphylococcus aureus and streptococci.
    • Sulfamethoxazole-trimethoprim may be effective for antibiotic-resistant Staphylococcus aureus infective mastitis, but is contraindicated during the first three months of breastfeeding.
    • All Purpose Nipple Ointment (APNO) containing mupirocin, betamethasone valerate, and miconazole can be prescribed for nipple infections, and ibuprofen powder can be added.
    • Amoxicillin, like ampicillin, is an extended-spectrum penicillin, and gastrointestinal upset can be expected.
    • Cephalexin is an oral drug similar to cefazolin, which is given intravenously, and has the same side effects and drug interactions.
    • Clindamycin is used to treat infective mastitis when there are serious hypersensitivity reactions to β-lactam antibiotics and is more effective than erythromycin, to which there is widespread bacterial resistance.

    Treatment Options for Infective Mastitis

    • Amoxicillin is often used in combination with the β-lactamase inhibitor clavulanic acid to treat infective mastitis, as it is an extended-spectrum penicillin.
    • The addition of clavulanic acid extends the spectrum of amoxicillin, although it may increase the likelihood of gastrointestinal upset.
    • Amoxicillin monotherapy is often effective, but the main source of bacterial resistance is a β-lactamase made by Staphylococcus, justifying the use of clavulanic acid.
    • Cloxacillin, a penicillin that is β-lactamase resistant and has a narrow spectrum of action, can also be used to treat mastitis.
    • Cephalexin, a first-generation oral cephalosporin, is a suitable alternative for patients allergic to penicillins, with a moderately broad spectrum of action.
    • Clindamycin is an option for individuals with serious hypersensitivity reactions to β-lactam antibiotics, although it may cause more gastrointestinal side effects.
    • Ciprofloxacin may be used as an alternative if clindamycin cannot be used, but it is not the preferred choice due to its poor activity against Staphylococcus aureus and streptococci.
    • Sulfamethoxazole-trimethoprim may be effective for antibiotic-resistant Staphylococcus aureus infective mastitis, but is contraindicated during the first three months of breastfeeding.
    • All Purpose Nipple Ointment (APNO) containing mupirocin, betamethasone valerate, and miconazole can be prescribed for nipple infections, and ibuprofen powder can be added.
    • Amoxicillin, like ampicillin, is an extended-spectrum penicillin, and gastrointestinal upset can be expected.
    • Cephalexin is an oral drug similar to cefazolin, which is given intravenously, and has the same side effects and drug interactions.
    • Clindamycin is used to treat infective mastitis when there are serious hypersensitivity reactions to β-lactam antibiotics and is more effective than erythromycin, to which there is widespread bacterial resistance.

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    Test your knowledge of antibiotic resistance with this quiz covering topics such as bacterial vaginosis, superbugs like MRSA, ways to avoid resistance, resistance mechanisms, modes of antibiotic action, and specific antibiotics and their targets.

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