A 3 year old boy presents with a 1 day history of loose stools, fever, abdominal cramping, headache, and myalgia. He has no blood in the stool. A careful history reveals that he has several pet tules. Which of the following is most likely the causative agent of his diarrhea?
Chlamydia psittaci Entamoeba histolytica Salmonella spp Staphylococcus aureus