<s>[INST] My 16 month old son has been sick with a stomach "virus" for the past few days. The last 4 diapers i've noticed small (1/2") worm like peices in his stool. At first I thought it was related to bananas, but now there are large clumps of these reddish brown peices in his stool, thousands with each diaper change. What is the liklihood of him having a parasite? [/INST] Viral infection with rotavirus is a very common cause of diarrhoea in children. It generally resolves on its own. All you need to do is to prevent dehyration by the use of ORS.It is not clear whether the white pieces that you refer to are worms or undigested food matter. The latter is more probable. However, worms are quite common in children of this age as they have a tendency of putting anything in their moutn. In case you think that he could have worms could be present. Giving a single dose of albendazole 400 mg syrup (10 ml) and repeating it after 14 days should be helpful.I hope that helps. Feel free to revert back with further queries if any. </s>