ID Flashcards
Antibiotic ladder
Penicillin -> Nafcillin -> Vancomycin -> Linezolid
Penicillin -> ampicillin/amoxicillin + b lactamase inhibitor–>piperacillin + beta lactamase inhibitor –> Meropenem
FQ
Cipro + Levo, mostly gram negatives (urinary)
Moxi, gram negatives and gram positives (respiratory)
Anaerobic treatment
Vagina and GI tract? Flagyl
Everything else? Clindamycin
Empiric treatment for cap
Ceftriaxone and azithromycin
or just azithromycin as OP
Empiric treatment for HCAP
Vancomycin and cefepime/zosyn
Empiric treatment for meningitis
Vanc + ceftriaxone
+steroids (if sick)
+ampicillin (if old, baby, chemo, HIV, transplant, on MAB)
Empiric treatment for UTI
Bactrim
Cipro
Ceftriaxone
Nitrofurantoin
Empiric treatment for cellulitis
Cephazolin
Bactrim
Clindamycin
How to diagnose HIV patients that present with flu like symptoms?
With a viral load **
Treatment for HIV
2NRTIs + 1 of something else
Newborn prophylaxis for HIV
AZT within 12H of delivery for 6 weeks
Primary tuberculosis
Cavitary lesion in lower or middle lobes, asymptomatic, caseating granulomas
Secondary tuberculosis
Caseating granulomas in upper lobes, fever, hemoptysis, night sweats, weight loss.
Negative ppd?
Not exposed. Return in 2 weeks if in healthcare for another
Who is positive if PPD >5cm?
Immunosuppressed, steroids, HIV, transplant, very close contacts
Who is positive if PPD >10cm?
At risk: prisons, healthcare workers, homeless
Who is positive if PPD >15cm?
Don’t test population, soccer moms
What to do if PPD positive?
CXR, if negative, then exposed, give INH and B6
If positive, then AFB. If negative give INH and B6
If positive, give RIPE.
How to evaluate somebody with signs and symptoms of TB?
CXR, AFB + Cx,
If both negative Not TB, but do NAAT to make sure
If both positive TB, give RIPE.
If CXR positive, but AFB negative, latent, give INH and B6.
Major Duke Criteria
Major: Persistent bacteremia with endocarditis causing bug
New regurgitation murmur
Vegetation on echo
Minor Duke Criteria
Risk factors: IVDU, history of endocarditis, bad valve
Fever >38
Vascular Manifestations - septic emboli, stroke, splinter hemorrhages, janeway lesions
Rheumatologic manifestations- Osler nodes, roth spots, RF, glomerulonephritis
Acute endocarditis
Caused by staph mostly (sometimes strep pneumo)
Patient is bacteremic and toxic with CHS and no rheum findings. Dx with blood cultures, treat until negative.
Diagnose with ECHO!
How to treat endocarditis
4-6 weeks of antibiotics
Surgery if CHF, >15mm vegetation or >10mm vegetation with emboli
When to do surgery for endocarditis?
If patient has CHF, if there is a vegetation >15mm, or if there is a vegetation >10 MM that has emboli
How to treat native valve endocarditis?
Vancomycin (give daptomycin if vanc allergic)
How to treat prosthetic valve endocarditis if
Vanc + gentamycin + cefepime
How to treat prosthetic valve endocarditis if between 60 and 365 days?
Vanc + gent
How to treat prosthetic valve endocarditis if >365 days
Vanc + gent + ceftriaxone
How to treat subacute endocarditis
Gent + ceftriaxone.
Subacute endocarditis
Usually with hacek organisms, patient has low grade fevers with rheumatologic manifestations. Blood cultures until positive, then give abx. TTE if questionable, if positive, then do TEE