Tue, 05 May 2026 22:53:12 +0000

You Won’t Believe What This Common Bacteria Is Doing in Your Blood—And Why It Matters Your blood isn’t just a silent liquid carrying oxygen and nutrients—it’s a dynamic battlefield where trillions of microscopic warriors, including bacteria, play a surprising and vital role. One particular bacteria species, Candidatus Visbyia, has recently pulled scientists by surprise by turning up in human blood in unexpected amounts—and researchers are scrambling to understand its implications. ### The Unexpected Presence of “Silent” Bacteria in Your Blood For decades, researchers believed the human bloodstream was largely sterile in healthy individuals—until advanced DNA sequencing technologies revealed otherwise. Among the microbial visitors now confirmed in blood samples are formerly gut-associated bacteria like Visbyia and other low-abundance species once thought too fragile to survive systemic circulation.