Antibacterial Flashcards

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1
Q

What mold is penicillin derived from?

A

Penicillium notatum

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2
Q

2 examples of semisynthetic antibacterials

A

Cephalosporins
Carbapenems

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3
Q

3 examples of Synthetic antibacterials

A

Trimethoprim
Linezolid
Quinolones

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4
Q

State 3 diseases that require bacteri[cidal] drugs

A

Infective endocarditis
Meningitis
Osteomyelitis

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5
Q

What does MLC stand for ?

A

Minimum lethal concentration

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6
Q

What does MIC stand for?

A

Minimum Inhibitory concentration

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7
Q

What is empirical therapy?

A

Treating the infection before culture results based on experience

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8
Q

3 side effects of antibiotic misuse

A

Steven Johnson syndrome
Nephrotoxicity
Clostridium difficile infection

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9
Q

What enzymes do cell wall synthesis inhibitors work on ?

A

Transpeptidase Carboxypeptidase

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10
Q

What are the types of cell wall inhibitors

A

Vancomycin
Bacitracin
B-lactams

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11
Q

4 examples of B-lactams

A

Penicillin
Carbapenem
Cephalosporins
Monobactam

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12
Q

5 Protein synthesis inhibitors

A

Tetracyclines
Aminoglycosides (bacteriocidal)
Chloramphenicol
Macrolides
Clindamycin

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13
Q

3 folate synthesis inhibitors

A

Sulfonamide
Trimethoprim
((Co-trimoxazole))

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14
Q

2 nucleic acid synthesis inhibitors

A

Rifampicin
Quinolones

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15
Q

3 types of Quinolones

A

Nalodixic acid
Ciprofloxacin
Oxolinic acid

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16
Q

How do genetics affect antimicrobial resistance?

A

Chromosomal mutation
Genetic transfer

17
Q

What mechanism did streptococcus pneumonia use to become resistant to penicillin ?

A

Modification of target (Sequence mutation)

18
Q

What are the 3 mechanism of modifications of target

A

Target bypass
Target hyper-production
Sequence mutation

19
Q

What mechanism does MRSA use?

A

Modification of target (target bypass)

20
Q

What antibiotics are normal B-lactamases resistant to?

A

Penicillin & Cephalosporins

21
Q

What antibiotics are extended spectrum B-lactamases resistant to?

A

Penicillin
Cephalosporin
Monobactams

22
Q

What does the combo: Penicillin + Clavulanic acid called

A

Co-amxoiclav / Augmentin

23
Q

Which bacteria have ESBL?

A

Enteric bacteria

24
Q

4 examples of B-lactamase inhibitors

A

Clavulanic acid
Tazo-, Sul-, Avi- Bactam

25
Q

Which Microbes are Carbapenemase resistant?

A

Enteric G-

26
Q

What Antibiotics are Acetylating, Adenylating & Phosphorylating enzymes (produced by G-) bacteria resistant to?

A

Aminoglycosides
Chloramphenicol

27
Q

Which MOs have a strain resistant to Vancomycin?

A

Enterococci & S. Aureus

28
Q

How does MTB resist Isoniazid?

A

Mutation in catalase peroxidase gene

29
Q

Which antibiotic is resisted by increasing efflux?

A

Sulfonamides (transport system)

30
Q

Which antibiotic is resisted by decreasing permeability ?

A

Aminoglycosides

31
Q

Which gene codes for PBP

A

MecA

32
Q

How does MRSA resist Methicillin?

A

By switching PBP for PBP2A

33
Q

What does AST stand for?

A

Antibiotic sensitivity test

34
Q

What are the 2 Antibiotic sensitivity tests?

A

Tube dilution & disk diffusion

35
Q

What is Kirby bauer test?

A

Another name for disk diffusion

36
Q

Who invented penicillin?

A

Alex fleming

37
Q

What is antimicrobial stewardship ?

A

Coordinated antimicrobial appropriate use program
(not important)

38
Q

Give 2 types of Carbapenems

A

Meropenem & Imipenem

39
Q

What is an example of a monobactam?

A

Aztreonam