Hi Susan, More than likely he aquired it through the feco-oral route. Did he take baths with his mum? Transmission through breast milk would be very unlikely. Did the mother have any symptoms? Here's some more information about parasite. http://www.cdc.gov/ncidod/dpd/parasites/dientamoeba/default.htm I hope the munchkin starts gaining weight once he is treated. I think other members of the family should also be tested to rule out asymptomatic carriage. Vaishali Kute, MD FAAP Atlanta GA *********************************************** To temporarily stop your subscription: set lactnet nomail To start it again: set lactnet mail (or digest) To unsubscribe: unsubscribe lactnet All commands go to [log in to unmask] The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(R) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html