Image Number K3627-16

They're the Royal Canadian Mounties of the immune system-the heroes who show up in the nick of time-and they take on all bacterial invaders, be they salmonella, listeria, pasteurella, or E. coli. They're infection-fighting white blood cells called heterophils, and poultry immunologist Michael Kogut has found a way to make them do his bidding to protect young poultry.

Photo by Keith Weller.

640 pixels wide: (k3627-16.jpg)