This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Considerations - Infectious Diseases, Subject name: Pediatrics
Which of the following causes mesenteric lymphadenitis? 
Select and explain. 
A. Adenovirus, B. Campylobacter, C. Yersinia pseudotuberculosis, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: d. All of the above(Ref: Nelson 20/e p 1405-6, 1611)Acute appendicitis, mesenteric lymphadenitis & ileocolitis have been reported in patients who have had appendectomies during C. jejuni infection.Yersinia pseudotuberculosis is most often associated with mesenteric lymphadenitis.Human Adenovirus may also cause mesenteric adenitis.