28 January 2011
Vol 331, Issue 6016

About The Cover

Cover image expansion

COVER False-colored scanning electron micrograph of the bacterial pathogen Streptococcus pneumoniae (typical length, ~1 micrometer), a major cause of pneumonia and meningitis. On page 430, Croucher et al. describe the use of whole-genome sequencing to track the global spread of a rapidly recombining S. pneumoniae lineage as it adapts to antibiotic use and vaccine introduction. Image: Dennis Kunkel Microscopy, Inc./Visuals Unlimited, Inc.