Antibacterials Flashcards

(41 cards)

0
Q

Vancomycin

A

Glycopeptide - B-lactam
is effective against gram positive bacteria
Reserved for penicillin reaistance
MRSA

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1
Q

Amoxycillin, flucloxacillin, dicloxacillin, phenoxymethyl are all examples of:

A

Penicillins
Cell wall synthesis inhibitors
First line choice for many bacterial infections

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2
Q

B-lactams

A

First line choice for many infections
Cell wall synthesis inhibitors

Blocks synthesis of cell wall mucopeptide - bactericidal effect on replicating bacteria

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3
Q

Example of a narrow spectrum penicillin

A

Benzylpenicillin

Flucloxacillin

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4
Q

Example of a moderate spectrum penicillin

A

Amoxicillin

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5
Q

Example of a broad spectrum penicillin

A

Amoxicillin-potassium clauvlanate

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6
Q

Example of an extended spectrum penicillin

A

Piperacillin

Active to pseudomonas

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7
Q

Penicillin interactions

A
Anticoagulants
Combined oral contraceptives
Probenecid
Allopurinol 
Amoxycillin
Fluclox
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8
Q

Cephalosporins might be used in what situation

A

Penicillin allergy

2nd line treatment for infection (soft tissue, bone, joint)

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9
Q

Antibacterial protein synthesis inhibitors

A

Macrolides
Aminoglycosides
Tetracyclines
Lincosamides

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10
Q

Macrolides

A

Erythromycin (main macrolide)
Roxithromycin

Bind to 50s subunit of ribosome blocking peptide chain

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11
Q

Drug interactions of macrolide a

A

Inhibit CYP3A4
Warfarin

(Effect on GIT may lead to interactions)

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12
Q

Bacterial DNA synthesis inhibitors

A

Quinolones/fluroquinolones

Nitroimidazoles

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13
Q

Clindamycin is an example of

A

Lincosamide

Protein synthesis inhibitor

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14
Q

Ciprofloxacin is a

A

DNA synthesis inhibitor

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15
Q

Metronidazole is a DNA synthesis inhibitor it’s interactions include

A

Warfarin
Alcohol
Barbiturates

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16
Q

Drugs that affect bacterial folate synthesis & utilisation

A

Sulfonamides
Trimethroprim
Cotrimoxazole

17
Q

Mupirocin

A

Bactram
Topical
Bacterial protein synthesis inhibitor

18
Q

Silver sulfadiazine

A

(Flamazine)
Topical sulphonamide antibiotic with silver
Binds to cell membrane - bactericidal

19
Q

Common bacterial infections in podiatry

A

Staphylococcus and streptococcus
(Gram positive)
Pseudomonas (gram neg)

20
Q

Purulent exudate is not produced in:

A

Anaerobic or strep infections

21
Q

Staphylococcus produces what type of purulent exudate

A

Creamy yellow pus

22
Q

Fruity smell with green pus

23
Q

Stain is absorbed in gram positive bacteria

What is an example of a gram positive bacteria

24
What does a culture help to determine?
Determining the identification of an organism | Determining if the bacteria is colonised or infected
25
Contaminated colonised bacteria
Bacteria is present but not multiplying. | Steady state of replication but not causing delayed healing
26
Critically colonised bacteria
Bacterial burden in the wound bed is increasing, initiates body's immune response No longer healing as expected
27
Infected bacteria
Bacteria present within the wound is multiplying Associated risk of local and systemic immune response Painful & may increase in size
28
Elevated erythrocytes sedimentation & CRP are
Inflammatory markers
29
What is the effect of high BGL on an infection
Difficult to control & reduced chance of healing
30
Impetigo infecting organism
Staphylococci and/or streptococci
31
Bulbous impetigo
Painless blisters 1-2cm diameter
32
Non-bullous impetigo
Thin walled easily ruptured blisters leaving areas of yellow crusted exudate
33
Treatment for impetigo
Topical Mupirocin
34
Ecthyma
Bacterial skin infection extending to the dermis
35
Ecthyma Infecting organism
Streptococci or pseudomonas aeruginosa
36
Cellulitis
Acute spreading infection of the skin & connective tissue (usually from trauma creating portal of entry)
37
Erysipelas
Form of cellulitis involving a lymphatic blockage accompanied by flu like symptoms
38
Erysipelas infecting organism
Streptococcus pyogenes
39
Necrostising fasciitis
Serious rapidly progressing bacterial infection of soft tissue & superficial & deep fascia
40
Cefazolin
Is clinically effective against infections caused by staphylococci and streptococci gram positive bacteria