Acidophilus?

hi I'm treating infant thrush with gentain violet and wondered if it would be at all beneficial to take acidophilus capsules in conjunction to help with the yeast I do not have a l yeast nor am I or have I or baby been on antibiotics I don't have a sugary diet so I don't know where the yeast came from will taking acidophilus daily help to prevent this from reoccuring and is it safe for feeding? I can ask the doc tuesday but until then any tips?