Electron microscopic visualisation of the in vitro phagocytosis of group B streptococci by bovine polymorphonuclear leucocytes

The Phagocytosis of group B streptococci by bovine blood polymorphonuclear leucocytes, after 30 minutes at 37°C, was visualised using scanning and transmission electron microscopy. Several polymorphonuclear leucocytes were seen to have phago-cytosed more than one bacterium, despite the initial ratio of bacteria to cells being unity. All bacteria within the cells appeared to be viable and some were undergoing multiplication.