Thank you for the query.
White stool is a serious symptom. Stool gets white, because there is no bile secretion to it. Lack of bile secretion can be caused by bile ducts obstruction due to gallstones. If so, you should have also dark urine, upper right abdominal pain
and nausea. So maybe your food poisoning
were bile ducts obstruction.
I suggest you to visit your doctor and have abdominal ultrasound
, blood work, liver tests and stool test
Hope this will help.