Welcome to this site. Work on this site began in February 2000. It is intended that all species of bacteria will be listed for which there is evidence of association with infection in humans. The site is aimed at clinicians and microbiologists who require the following kinds of information: a comprehensive list of medically significant bacteria, current nomenclature for such organisms, concise information on clinical significance and published data on therapies and antimicrobial susceptibilities of seldom-encountered bacteria.