comlex deck 1

Question 1

Rickettsia prowazecki

Answer 1

typhus- wars, social upheaval
transmitted by louse
obligate intracellular

damage to endothelial cells –> vasculitis and rash, capillary leakage and thrombosis can lead to shock

Question 2

crush injuries with gas production and edema- organism?

Answer 2

clostridium perfringens
gas gangrene
gram positive anaerobic, spore-forming rods
alpha toxin is a lecithinase

Question 3

mastitis, most common causative organism?

Answer 3

staph aureus

Question 4

rotavirus shape

Answer 4

icosahedral, segmented double-stranded RNA virus

Question 5

strongyloides stercoralis

Answer 5

threadworm
causes persistent infections in the immunocompromised
autoinfection can produce pneumonitis, diarrhea, cutaneous pruritis

treat with ivermectin
Ivermectin acts by increasing invertebrate nerve and muscle cell membrane permeability by binding to chloride ion channels, thereby resulting in paralysis and subsequent death of the parasite.

Question 6

unvaccinated woman who delivers a child with patent ductus areteriosus, pulmonary stenosis, cataracts, microcephaly and deafness =

Answer 6

congenital rubella syndrome