Thanks for your question.
Your diagnosis is very simple.You had pain abdomen with white blood cell
count increase and CT SCAN
showed thickening in illeum.It is probably a case on ilial or intestinal tuberculosis
.There are other rare possibilities too-it can be a crohns colitis
,malignancy involving ileum,volvulus or just infection of ileum but this causes are very rare.
But i am thinking why you have pain.Probably this causes sub acute intestinal obstruction
so you have pain.
So continue taking antibiotics,taking a laxative as you need regular stool pass,take plenty of water with salt as in this cases chance of dyselectrolytimeia is high.Please do a straight xray abdomen to see any evidence of obstruction or perforation.
If your pain subsided,passed stool,urine,become stable then you can leave in your house otherwise best to keep yourself admitted in any hospital/nursing home as in your cases sudden intestinal obstruction can occur and that is a dreadful complication.
Consult gastrosurgeon on Friday and follow his advise.
Dr Sourav Ganguly