Review Questions

A 55 yo patient presents to the ER with subacute endocarditis. Patient’s history was significant for a recent dental procedure. What allows for the organism to bind to damaged heart valves?
A. Pili
B. Dextrans
C. Biofilm
D. TSST-1
E. Protein A

A 6 month old child presents to the clinic with hypotonia. History was significant for ingestion of honey containing spores of a gram (+) rod. What is the mechanism of the toxin produce by this organism?
A) cleavage of SNARE protein inhibiting GABA release
B) damage of cell membranes
C) inhibition of Ach release
D) depolymerization of actin
E) ADP-ribosylation of EF-2

A 10 yo patient presents to the clinic with hematuria. 2 weeks ago, patient had a honey crusted lesion on his face but did not see a physician. Another infection by this organism is pharyngitis. A complication of pharyngitis is a result of antibodies to which portion of the organism?
A. Capsule
B. Protein A
C. Cell wall
D. M protein
E. Erythrogenic toxin

22yo female presents with fatigue for the past few days. Patient became a vegetarian 3 months ago. Blood tests show a decreased MCV but normal ferritin. Patients experienced no other symptoms. What is the cause of RBC damage in this condition?
A) lack of membrane protein that anchors DAF
B) glutamate to valine mutation
C) iron deficiency
D) tetramers of excess globin chains
E) Vitamin B12 deficiency

B
C
D
D