Yes, probiotics are excellent to use to help rebuild the intestinal bacteria after a bout of diarrhea. When you have diarreha, it cleans out the good stuff, therefore, you need to replenish it by a good round of probiotics. If you do not rebuild it, it makes you more prone to further viruses and infections since 80% of our immune system is in our digestive track. I give my 17m old FloraBaby by Renew Life, daily, it is great to take during cold and flu season and began giving her them when she was 4wks old. It will not hurt and there was a study just published about how the antibiotics use in our foods is hurting our own immunity. Hence, it helps to rebuild it with probiotics. Florastor is a good brand too.
Good Luck,
J. W. MPH
Wellness Educator/Lifestyle and Wellness Coach