if you have all these pathogens - any sugars will do harm in my opinion. you alreday know about maltodextrine....but beware there are many names - FOS, MOS, GOS...
i know its hard to find kosher supplements i still search for. especially probiotics.
i've had bad experience with supplements containing FOS althought the mix was very good. probiotics L.rhamnosus...
no FOS, GOS, MOS you name it