This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Longitudinal ulcers in the intestine are seen in: September 2008 
Select and explain. 
A. Tuberculosis, B. Typhoid, C. Amoebiasis, D. Yersinia
B: Typhoid
Answer: B: Typhoid 
Explanation: Ans. B: Typhoid In typhoid fever there is at first a general swelling of the Peyer's patch; it is an inflammatory swelling accompanied by abundant infiltration of leucocytes which occupy both the closed follicles and the mucous membrane. As the time goes on the whole tissue gets more and more infiltrated with leucocytes, and the raised patch gets more solid and its surface more homogeneous. On this condition follows Necrosis. The infiltrated and altered patch or solitary follicles forms a slough, of larger or smaller size. Mucosal shedding creates oval ulcers, oriented along the long axis of the ileum, that may perforate. Serpentine, elongated ulcers, oriented along the long axis of bowel is seen in Crohn's disease.