ID

Question 1

acute bacterial rhino sinusitis

Answer 1

sxs persist for >/= 10 days without improvement
sxs severe in onset (fever, drainage) for >/= 3 days
sxs worsening following initial improvement

tx: amoxicillin +/- clavulanate

Question 2

most common cause of constrictive pericarditis in developing world

Answer 2

tuberculosis

Question 3

antibiotics effective against Pseudomonas aeruginosa

Answer 3

antipsedomonal penicillins: ticarcillin and piperacillin

cephalosporins: Ceftazidime and Cefepime
aminoglycosides: amikacin, gentamicin, and tobramycin
fluoroquinolone: ciprofloxacin and levofloxacin
monobactams: aztreonam
carbapenems: imipenem and meropenem

Question 4

malignant otitis externa tx of choice

Answer 4

IV ciprofloxacin

Question 5

tx of early localized lyme

Answer 5

doxycycline, amoxicillin, and cefuroxime have equivalent efficacy

doxy is often used because it is effective in treating coexisting Anaplasma infection (also transmitted by Ixodes tick) but should be avoided in children <8 and pregnant women