This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
Most common complication of Shigellosis 
Select and explain. 
A. HUS, B. Reactive arthritis, C. Pneumonia, D. Meningitis
A: HUS
Answer: A: HUS 
Explanation: (A) HUS # EXTRAINTESTINAL COMPLICATIONS OF SHIGELLOSIS:> Common complications: Bacteremia HUS: occur with S. dysenteriae type 1 infection. Manifestations of HUS usually develop at end of first week of shigellosis. Oliguria, marked drop in hematocrit are the first signs & progress to anuria with renal failure & to severe anemia with congestive heart failure.> Less common complications: Reactive arthritis> Rare complications: Pneumonia; Meningitis; Vaginitis (in prepubertal girls); Keratoconjunctivitis & "rose spot" rashes.