Cells at Work: Bacteria! 1

Cells are not the only things at work in your body! Deep in your gut, a war rages...between good bacteria, bad bacteria, and opportunistic pathogens—and occasionally, against outside invaders! And if bitter rivals Clostridium Perfringens, leader of the bad bacteria, and ^Bifidum Bacteria, leader of the good, get their way, the battle for intestinal supremacy and safety will never end!