Hi thanks for asking question. Because if eating deer burger and symptoms thereafter mostly suggestive of food poisoning and so bacterial gastroenteritis. Take ofloxacillin and ornidazole combination drug for it. Meanwhile get your stool examined for parasite egg or larva and for pus cell. Avoid heavy fatty diet for few days.maintain hydration with more water and fruit juices. Take light meal with frequent interval. If feeling more weakness ORS mixed with water and taken. Pizza, burger like food avoided for few days. For vomiting domperidone can taken. You will definitely get relief . I hope I have solve your query. If still diarrhea continue then we will think further.