Contents

21 March 2008
Vol 319, Issue 5870

About The Cover

Cover image expansion

COVER Clusters of the pathogenic bacterium Staphylococcus aureus visualized by scanning electron microscopy. Staphylococcus aureus has been called a "superbug" because of its ability to resist numerous antibiotics and evade host antimicrobial mediators, including nitric oxide. See page 1672.

Image: Annie Cavanagh/Wellcome Images