Thanks for the info on dysentery
Its not very often that you get educated by patients about common illnesses....
However I understand your anxiety and the need to discuss all the possibilities..
Dysentery is ceratinly possible in case like your son's , however a stool test would quite easily pick it up...
Also this is almost certainly treated with antibiotics before further investigations like a meckel's scan are planned.
If his weight gain is inadequate then I would be worried about the possibility of an Inflammatory Bowel disease which while uncommon in children can present with simialr symptoms...
Talk to you pedaitrician and consider a duodenal biopsy under endoscopy as needed, for confirmation of diagnosis,
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