Antibiotics III Flashcards

1
Q

what are good choices for uncomplicated skin and soft tissue infections? what if there is an allergy to these?

A

penicillins (ampicillin)
1st generation cephalosporin (cephalexin)

if allergy - vancomycin, clindamycin

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2
Q

what are good choices for complicated skin and soft tissue infections?

A

penicillin plus lactamase inhibitor

broader spectrum

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3
Q

what three major agents are used against MRSA?

A

vancomycin
linezolid
daptomycin

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4
Q

what are the empiric agents for osteomyelitis?

A

vancomycin

cephalosporins (ceftriaxone, cefepime)

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5
Q

what general class of abx drugs is used against bone and joint infections?

A

cell wall inhibitors

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6
Q

what agents are used for bone and joint infections following surgery?

A

penicillin plus lactamase inhibitor

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7
Q

what agent is used as empiric treatment of septic arthritis?

A

ceftriaxone

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8
Q

what agents are used for MRSA in septic arthritis?

A

vancomycin
linezolid
daptomycin

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9
Q

what agents are used for acute sinusitis?

A

amoxicillin plus clavulanate

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10
Q

what agents are used for pharyngitis in upper respiratory tract infections?

A

penicillin or amoxicillin

with penicillin, can be more confident of gram positivity

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11
Q

what agents are used for ambulatory bacterial pneumonia? what is the reason for this?

A

macrolides

erythromycin
azithromycin
clarithromycin

m. pneumoniae does not have a cell wall - do not use agents that target cell walls

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12
Q

what agents are used for hospital acquired bacterial pneumonia?

A

beta lactam plus macrolide

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13
Q

what agents are used for MRSA complicated bacterial pneumonia?

A

vancomycin

linezolid

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14
Q

what is the big difference between s. pneumoniae and mycoplasma pneumoniae?

A

mycoplasma pneumoniae does not have peptidoglycan, thus beta lactams will not work

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15
Q

what agents are used for uncomplicated UTI - cystitis?

A

trimethoprim - sulfamethoxazole

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16
Q

what agents are used for uncomplicated UTI - pyelonephritis?

A

TMP-SMX

fluoroquinolone

17
Q

what agents are used for complicated UTIs?

A

fluoroquinolone

TMP-SMX

18
Q

what agents are used for prostatitis?

A

fluoroquinolone

TMP-SMX

19
Q

what agents are used for intra-abdominal infections?

A

ticarcillin (BSA) plus clavulanate

20
Q

what agents are used for c. diff infection?

A

metronidazole (moderate) - c. diff is anaerobic - activates the metronidazole prodrug

vancomycin (severe)

21
Q

intra-abdominal infections are usually caused by what type of bacteria?

A

gram negative

22
Q

what agents are used for community acquired bacterial meningitis in patients over 2 months of age?

A

ceftriaxone or cefotaxime (3rd and 4th generation - good CNS penetration)

plus vancomycin

23
Q

what agents are used for community acquired bacterial meningitis in patients under 2 months of age (neonates)?

A

ampicillin plus cephalosporin with or without gentamicin

24
Q

what agents are used for sepsis syndrome?

A

empiric 3rd or 4th generation cephalosporin (cefepime)

plus vancomycin

25
Q

what drugs are used for endocarditis?

A

ceftriaxone plus vancomycin

26
Q

what drugs are used for fever and neutropenia?

A

empiric ciprofloxacin

plus amoxicillin / clavulanate

27
Q

what agents can be used against MDR enterococci?

A

linezolid
daptomycin
tigecycline

28
Q

what agents can be used against MDR gram negative bacteria?

A

extended spectrum beta lactamases - carbapenems (imipenem, meropenem)

carbapenemases - polymyxin B, tigecycline