MeSH Browser

MeSH Heading: R Factors
Tree Number(s): G05.360.600.600
Unique ID: D011815
RDF Unique Identifier: http://id.nlm.nih.gov/mesh/D011815
Annotation: bacterial
Scope Note: A class of plasmids that transfer antibiotic resistance from one bacterium to another by conjugation.
Entry Term(s): R Factor; R Plasmid; R Plasmids; Resistance Factor; Resistance Factors
NLM Classification #: QW 51
Previous Indexing: Drug Resistance, Microbial (1967-1974)
Public MeSH Note: 78; was see under DRUG RESISTANCE, MICROBIAL 1975-77
History Note: 78(75); was see under DRUG RESISTANCE, MICROBIAL 1975-77
Date Established: 1978/01/01
Date of Entry: 1974/11/11
Revision Date: 2020/05/27

Allowable Qualifiers: administration & dosage (AD)

adverse effects (AE)

agonists (AG)

analysis (AN)

antagonists & inhibitors (AI)

biosynthesis (BI)

blood (BL)

cerebrospinal fluid (CF)

chemical synthesis (CS)

chemistry (CH)

classification (CL)

drug effects (DE)

economics (EC)

genetics (GE)

history (HI)

immunology (IM)

isolation & purification (IP)

metabolism (ME)

pharmacokinetics (PK)

pharmacology (PD)

physiology (PH)

poisoning (PO)

radiation effects (RE)

standards (ST)

supply & distribution (SD)

therapeutic use (TU)

toxicity (TO)

ultrastructure (UL)

urine (UR)

Concept UI: M0018363
Scope Note: A class of plasmids that transfer antibiotic resistance from one bacterium to another by conjugation.
Terms: R Factors Preferred Term
Term UI T034881
Date01/01/1999
LexicalTag ABX
ThesaurusID NLM (1975); R Factor
Term UI T000998407
Date11/20/2019
LexicalTag NON
ThesaurusID NLM (2021); R Plasmid
Term UI T000998408
Date11/20/2019
LexicalTag NON
ThesaurusID NLM (2021); Resistance Factor
Term UI T000998409
Date11/20/2019
LexicalTag NON
ThesaurusID NLM (2021); R Plasmids
Term UI T034882
Date05/02/1984
LexicalTag NON
ThesaurusID UNK (19XX); Resistance Factors
Term UI T034883
Date11/11/1974
LexicalTag NON
ThesaurusID UNK (19XX)

R Factors MeSH Descriptor Data 2025