ID Flashcards
SIRS criteria
WBC count 12
T 38C (100.4F)
RR >22 or PaCO2 90
Liebermeister’s Rule
Each degree increase in temp Celsius –> an 8 beat increase per minute in heart rate
Septic shock
Severe sepsis req’ing pressures to maintain adequate perfusion
Severe sepsis
Sepsis +
1 indication of end organ damage:
- HYPOTENSION - Systolic bp 40 points below patients baseline
- Lactate >4
- AMS
- Renal failure
- Hyperglycemia in a pt who is not diabetic
Tx of sepsis
Initiate early antibiotics and aggressive fluid resuscitation
- Vanco
- Zosyn
- In HCAP add Levo (750 mg IV) to provide double pseudomonas coverage
- In urosepsis - ceftriaxone (1 g IV/day) better option
- For meningitis - Vanco + Ceftriaxone (2g IV/day)
Who’s at risk for HCAP
- Two day hospital admission over the last 3 months
- Lives in along term care facility
- Out pt antibiotics or chemotx in last 30 days
- Dialysis pts
In original sepsis protocol pts got
X more fluids
Tx of otitis externa
Cortisporin otic: neomycin, polymixin b, hydrocortisone
Tx of whooping cough
IV macrolide
To prevent transmission to others
Rocky Mountain spotted fever
Doxycycline - ok in peds at recommended dose and duration
Encephalitis, myocarditis, renal failure, pulm infiltrates and respiratory failure can occur
Scabies
Permethrin
Impetigo: tx
Topical antibiotic,
Ie mupirocin
Us staph or strep
Coccidiomycosis
Southwestern US
Soil exposure
Arizona
Histoplasmosis
Ohio River Valley ans Mississppi
Ehrlichiosis
X
Otitis externa
Tx corticosporin otic (neomycin, polymixin B and hydrocortisone) SUSPENSION rather than solution as it is less ototoxic
Is severe and ear canal is swollen shut, use wick or gauze to deliver topical antibiotic deep
Typical organism pseudomonas or staph aureus, MRSA unusual
Malignant otitis externa
MCC pseudomonas
Tx: oral fluoroquinolones
Seen in immunocompromised pts, most commonly diabetics, HIV and elderly
Persistent symptoms of otitis externa despite tx should raise suspicion for this dz
Can invade skull base and affect CNs, Facial N affected first
Ocular HSV
Dendrite lesion on fluroscein stain
Requires topical ophthalmic therapy - trifluridine 1%
Hutchinsons sign
If skin lesions present also tx with acyclovir
Chalazion
Inner surface of eyelid
May need antibiotics and I&D
ANTHRAX : TX
post-exposure prophylaxis
doxycycline or ciprofloxacin x60 days
amoxicillin in kids, pregnant/lactating women exposed to susceptible strains
monoclonal antibody available
encephalitis
infection of brain parenchyma
can present with focal neurologic findings: aphasia, seizure, hallucinations, motor weakness
mcc HSV
dx: based on CSF analysis from LP
CT head warranted but negative
meningitis
infection of the meninges of brain and spinal cord
most common bacterial etiology:
strep pneumo - adults
Neisseria meningitidis - kids
consider Listeria monocytogenes in elderly and immunocompromised pts
most commonly implicated virus is enterovirus
pts at highest risk of developing are at extremes of age, those with ENT infections, chronically ill and immunosupressed, and those who use EtOH and cigarettes
outbreaks have been found among persons in crowded living conditions such as dorms or barracks and in poverty stricken areas
dx: based on CSF analysis from LP - low glucose, high protein
CT head warranted but negative
Pericarditis
ST:T wave if ratio >25%, then it’s 85% sn for pericarditis
As opposed to early repol