This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Which of the following is not associated with food poisoning? 
Select and explain. 
A. Onset with vomiting, B. Tenesmus, C. Leukocytosis, D. High skin subrface temperature
C: Leukocytosis
Answer: C: Leukocytosis 
Explanation: <p> In case of food poisoning blood investigation should be normal. Leucocytosis is seen in cholera, a differential diagnosis of food poisoning. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:240. <\p>