Audio Qbank – HY USMLE Q #524 – Immunology / Microbiology

A 69-year-old man presents to emergency with a 12-hour history of severe lower left abdominal pain. Vitals are: temperature 103 F, HR 90, RR 18, BP 90/55. CT of the abdomen with contrast shows diverticulitis with perforation. Blood cultures are drawn and empiric IV antibiotic therapy initiated. Binding of which of the following is the most likely mechanism for this patient’s hypotension?

IFN-γ receptor
IL-12 receptor
MHC-I
MHC-II and T-cell receptor
Toll-like receptors