A Middle-Aged Women Presented to the Emergency Room Complaining of Cramping

A middle-aged women presented to the emergency room complaining of cramping and gastrointestinal discomfort.She had recently attended a family reunion the past weekend.The event was a picnic where potato salad,hamburgers,deviled eggs,hot dogs and chips were served.A feces culture was requested resulting in no growth.What would be the next recommended follow-up testing?

A) Serologic testing for IgM and IgG
B) No follow-up testing required
C) Collect an additional specimen and attempt to cultivate on specialized media
D) Treat the patient with ampicillin