shroom....Funny that you mention quorum sensing. I'm going to take this even further -- which would confirm your own result concerning multi-pathogen associations associating with candida. And it may even shock you:
Evidence that candida biofilms are shared by other pathogen species:
53. Adam B, et al, Mixed species biofilms of Candida albicans and Staphylococcus epidermidis. J Med Microbiol; 51(4); pp 344-349; April 2002.