Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

NLM Logo

beta-Lactams MeSH Descriptor Data 2025


MeSH Heading
beta-Lactams
Tree Number(s)
D02.065.589.099
D02.886.108
D03.633.100.300
Unique ID
D047090
RDF Unique Identifier
http://id.nlm.nih.gov/mesh/D047090
Scope Note
Four-membered cyclic AMIDES, best known for the PENICILLINS based on a bicyclo-thiazolidine, as well as the CEPHALOSPORINS based on a bicyclo-thiazine, and including monocyclic MONOBACTAMS. The BETA-LACTAMASES hydrolyze the beta lactam ring, accounting for BETA-LACTAM RESISTANCE of infective bacteria.
Entry Term(s)
4-Thia-1-Azabicyclo(3.2.0)Heptanes
4-Thia-1-Azabicyclo(4.2.0)Octanes
beta-Lactam
Pharm Action
Anti-Bacterial Agents
Registry Numbers
0
Previous Indexing
Lactams (1974-2004)
Public MeSH Note
2005; see LACTAMS 1996-2004
History Note
2005; use LACTAMS 1996-2004
Date Established
2005/01/01
Date of Entry
2004/07/07
Revision Date
2020/05/27
beta-Lactams Preferred
4-Thia-1-Azabicyclo(3.2.0)Heptanes Related
4-Thia-1-Azabicyclo(4.2.0)Octanes Related
page delivered in 0.163s