MUC5AC and congenital rubella syndrome: Through metagenomics analysis, Lucas et al. reported that anaerobic microbiota plays a crucial virulence role in CRS; they also revealed that a mucin-degrading anaerobic microbial consortium, composed of Prevotella, Fusobacterium, and Streptococcus, enhances the virulence of CRS–related S. aureus25.