Yes, propolis has long been known to affect candida virulence, but so far it's lone application is with dentures where the saturation levels found in studies can be replicated.

It also has antibacterial properties against Gram positive and negative bacteria, which includes many of the strains found in probiotics, as well as staph, TB. e. coli, etc.

It's a good natural antibiotic and has a strong effect against microbes.