Q. A 35-year-old male presents to your clinic with symptoms of fever, chills, headache, and muscle aches. He also reports nausea, vomiting, and diarrhea. He reports experiencing these symptoms for the past three days, and describes the vomiting and diarrhea as non-bloody, and non-bilious. The patient has no significant medical history. He was previously healthy and does not have any chronic illnesses. The patient recently returned from a hiking trip where he ate uncooked hot dogs for several days. He reports the hot dogs “smelled funny” by the last day of the trip, yet “tasted normal”. On physical examination, the patient has a fever of 38.5 degrees Celsius (101.4 degrees Fahrenheit), and his blood pressure is 90/60 mm Hg. His neurologic exam is nonfocal. Auscultation of his chest reveals clear breath sounds bilaterally, and his heart is in regular rate and rhythm, with no murmurs, rubs, or gallops. The patient’s abdomen is tender, yet no hepatosplenomegaly is appreciated. No rashes or lesions are present, and no peripheral edema is detected. You obtain a stool sample from the patient. Culture results are pending, though preliminary inspection reveals small, Gram-positive coccobacilli showing tumbling motility (see image). Based on the information you have at this point in time, which of the following is the most likely diagnosis?