Template:POTD/2008-05-17

Picture of the day

Red blood cells on an agar plate are used to diagnose infection. The plate on the left shows a positive Staphylococcus infection. The plate on the right shows a positive Streptococcus infection and with the halo effect shows specifically a beta-hemolytic group A. These infections can occur in patients undergoing chemotherapy.Bill Branson, National Cancer Institute