Physician Assistant Practice Test II Sample Physician Assistant National Certifying Exam (PANCE) Progress Indicator: Question 1 of 20 1.  A 33 year-old patient returns from a community picnic that was held on a hot July day.  The patient developed severe explosive diarrhea, nausea, vomiting and abdominal cramps six hours after having homemade potato salad and hot dogs.  Multiple people who ate at this picnic have similar symptoms.  There is no associated fever.  What is the most likely causative organism for these symptoms? Choices: Clostridium perfringens Campylobacter jejuni Shigella Staphylococcus aureus