This scanning electron microscope (SEM) image shows a mouse skin infection caused by Streptococcus pyogenes (pseudocolored purple). The bacterium, known as flesh-eating bacteria, has aggressively ...

Alpha hemolytic organisms (Streptococcus pneumoniae and Streptococcus mitis) are tested for their susceptibility to Taxos P (optochin). The beta hemolytic organisms (Streptococcus pyogenes and ...