This episode is all about saliva: how certain bacteria survive in it, and how swallowing saliva might cause intestinal inflammation.

Links for this episode:

• Genes for the Streptococcus pyogenes fitness in human saliva (mSphere)
• Swallowed bacteria drive colonic inflammation (Science)
• Intestinal inflammation induced by oral bacteria (Science)
• Human oral microbiome (J Bact)
• T cell subsets (Nat Rev Imm)
• Image credit