Unless the feces is white and stringy or really odd looking I really wouldn't worry about your frogs poop. I am not sure what the concern here is exactly, have you fed your frog live fish such as goldfish (commonly sold as disease/parasite ridden feeder fish)? If so there is some risk, if not, I wouldn't worry.
ACF are scavengers that, in the wild, will eat anything and everything -- dead or alive. I would say the chances of having a frog that is somehow sick or parasite ridden is pretty slim to none.