hi, it is a common problem.
Dysentery is a specific word used for blood in stools. I believe you probably mean loose motions.
The most common cause of
fever and loose motions are viral fevers.
The invasive infections which need to be treated with specific antimicrobials have one of the following characters blood ,pus,fowl smell,associated with stool or colicky pain before passing motions.
All such children need to be evaluated by examination of fresh stool by pathologist for evidence of pus cells, blood cells,parasite or protozoa( ameba giardia etc).green color signify hurried motility of intestine and is not an indication of antibiotics.
the main stay of therapy is maintenance of hydration by plenty of fluids containing salts and sugars like
ORS,buttermilk,kaanji, kairi pani, etc
zinc 20 mg per day reduces fluid loss.
paracetamol as required in dose of 10 to 15 mg /kg/dose for fever.
diet containing banana and curd is very helpful along with easy to digest food like hard cooke khichri etc.
Hope you find it useful