Browse AMR Genes
Explore antimicrobial resistance genes from the literature
Explore antimicrobial resistance genes from the literature
beta-lactamase
Overview
| Allele | Database | Papers | Drug Classes | Organisms | Countries | Years | Sequence Accession | Protein Accession |
|---|---|---|---|---|---|---|---|---|
| blaCMY-5 | Reslit | 1 | cefoxitin, cefotaxime +2 | Escherichia coli +1 | - | 1999 | Y17716|Y17846 | - |
| blaCMY-4 | Reslit |
| 2 |
| cephalosporins, penicillins +1 |
| Proteus mirabilis |
| Poland |
| 2000, 2004 |
| AJ555823|AJ555825 |
| - |
| blaCMY-2 | Reslit | 12 | cefotaxime, ceftazidime +10 | Escherichia coli +9 | Taiwan, Canada, United States, Pennsylvania, Europe, northeastern United States, Singapore, Honduras | 2000, 2002, 2003, 2004, 2005 | AF252122 | - |
| blaCMY-13 | Reslit | 1 | cefotaxime, ceftazidime +5 | Escherichia coli | - | 2004 | AY339625 | - |
| blaCMY-15 | Reslit | 1 | cephalosporins, penicillins +1 | Proteus mirabilis | Poland | 2004 | AJ555823|AJ555825 | - |
| blaCMY-14 | Reslit | 1 | cephalosporins, penicillins +1 | Proteus mirabilis | Poland | 2004 | AJ555823|AJ555825 | - |
| blaCMY-12 | Reslit | 1 | cephalosporins, penicillins +1 | Proteus mirabilis | Poland | 2004 | AJ555823|AJ555825 | - |
| blaCMY | Reslit | 1 | ceftriaxone, cefoxitin | Salmonella +1 | United States | 2005 | X91840 | - |
Characterization and nucleotide sequence of a Klebsiella oxytoca cryptic plasmid encoding a CMY-type beta-lactamase: confirmation that the plasmid-mediated cephamycinase originated from the Citrobacter freundii AmpC beta-lactamase.
CuratedThe study characterizes a CMY-5 beta-lactamase encoded by a cryptic plasmid in Klebsiella oxytoca, which confers resistance to extended-spectrum beta-lactams.
Occurrence and detection of AmpC beta-lactamases among Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis isolates at a veterans medical center.
The study identifies the presence of AmpC beta-lactamases in E. coli, K. pneumoniae, and P. mirabilis isolates, highlighting the importance of detecting these enzymes for effective antimicrobial treatment.
Dissemination of CTX-M-3 and CMY-2 beta-lactamases among clinical isolates of Escherichia coli in southern Taiwan.
The study identifies CTX-M-3 and CMY-2 beta-lactamases as significant contributors to beta-lactam resistance in clinical isolates of Escherichia coli in southern Taiwan.
Occurrence and characterization of resistance to extended-spectrum cephalosporins mediated by beta-lactamase CMY-2 in Salmonella isolated from food-producing animals in Canada.
The study identifies the beta-lactamase CMY-2 as a mediator of resistance to extended-spectrum cephalosporins in Salmonella isolates from food-producing animals in Canada.
Occurrence of newer beta-lactamases in Klebsiella pneumoniae isolates from 24 U.S. hospitals.
The study identified several beta-lactamases, including bla DHA-1, bla ACT-1, bla FOX-5, bla CMY-2, and bla KPC-2, in Klebsiella pneumoniae isolates from 24 U.S. hospitals. These enzymes confer resistance to various beta-lactam antibiotics.
Molecular characterization of cephalosporin-resistant Salmonella enterica serotype Newport isolates from animals in Pennsylvania.
The study identifies the bla CMY-2 gene as the primary cause of cephalosporin resistance in Salmonella enterica serotype Newport isolates from Pennsylvania, highlighting its plasmid-mediated nature and association with multidrug resistance.
Cephalosporin-resistant Escherichia coli among summer camp attendees with salmonellosis.
The study identified CTX-M-9, CMY-2, and TEM-1 beta-lactamase genes in extended-spectrum cephalosporin-resistant Escherichia coli (ESCREC) isolates from a summer camp outbreak. These genes conferred resistance to various β-lactam antibiotics.
Variety of beta-lactamases produced by amoxicillin-clavulanate-resistant Escherichia coli isolated in the northeastern United States.
The study identified various beta-lactamases, including TEM-type, CMY-2, and OXA-type, in amoxicillin-clavulanate-resistant Escherichia coli isolates. Notably, two isolates harbored inhibitor-resistant TEM enzymes (TEM-34 and TEM-122) that conferred resistance to amoxicillin-clavulanate.
CTX-M and plasmid-mediated AmpC-producing Enterobacteriaceae Singapore.
The study identifies various CTX-M and plasmid-mediated AmpC beta-lactamase genes in Enterobacteriaceae isolates from Singapore, highlighting the emergence of these resistance mechanisms in the region.
CMY-13, a novel inducible cephalosporinase encoded by an Escherichia coli plasmid.
The study identifies CMY-13, a novel inducible cephalosporinase encoded by a plasmid in Escherichia coli, which confers resistance to multiple beta-lactam antibiotics.
Pediatric infection due to multiresistant Salmonella enterica serotype Infantis in Honduras.
The study reports the first detection of bla CTX-M-15 in Salmonella and identifies multiple beta-lactamase genes (bla TEM-1b, bla SHV-5, bla CTX-M-15, and bla CMY-2) in a multidrug-resistant Salmonella enterica serotype Infantis isolate from Honduras.
Four variants of the Citrobacter freundii AmpC-Type cephalosporinases, including novel enzymes CMY-14 and CMY-15, in a Proteus mirabilis clone widespread in Poland.
The study identifies four variants of the Citrobacter freundii AmpC-type cephalosporinases, including novel enzymes CMY-14 and CMY-15, in a Proteus mirabilis clone widespread in Poland.
Four variants of the Citrobacter freundii AmpC-Type cephalosporinases, including novel enzymes CMY-14 and CMY-15, in a Proteus mirabilis clone widespread in Poland.
The study identifies four variants of the Citrobacter freundii AmpC-type cephalosporinases, including novel enzymes CMY-14 and CMY-15, in a Proteus mirabilis clone widespread in Poland.
Four variants of the Citrobacter freundii AmpC-Type cephalosporinases, including novel enzymes CMY-14 and CMY-15, in a Proteus mirabilis clone widespread in Poland.
The study identifies four variants of the Citrobacter freundii AmpC-type cephalosporinases, including novel enzymes CMY-14 and CMY-15, in a Proteus mirabilis clone widespread in Poland.
Four variants of the Citrobacter freundii AmpC-Type cephalosporinases, including novel enzymes CMY-14 and CMY-15, in a Proteus mirabilis clone widespread in Poland.
The study identifies four variants of the Citrobacter freundii AmpC-type cephalosporinases, including novel enzymes CMY-14 and CMY-15, in a Proteus mirabilis clone widespread in Poland.
Acquisition of resistance to extended-spectrum cephalosporins by Salmonella enterica subsp. enterica serovar Newport and Escherichia coli in the turkey poult intestinal tract.
The study demonstrates that the 72-MDa conjugative plasmid carrying the cmy-2 gene can be transferred from Escherichia coli to Salmonella enterica subsp. enterica serovar Newport, leading to resistance against extended-spectrum cephalosporins and other antibiotics.
The genome sequence of Salmonella enterica serovar Choleraesuis, a highly invasive and resistant zoonotic pathogen.
The study identifies multiple antimicrobial resistance genes on plasmids pSC138 and pSCV50 in Salmonella enterica serovar Choleraesuis SC-B67, including blaTEM-1, blaCMY-2, tetRA, strA, aadA2, sulI, sulII, catI, cmlA, aph, sat, mef, mer, ebr, qac, and blaTEM-67. Additionally, mutations in the chromosomal genes gyrA and parC, along with the inactivation of acrR, contribute to ciprofloxacin resistance.
Outbreak of dysentery associated with ceftriaxone-resistant Shigella sonnei: First report of plasmid-mediated CMY-2-type AmpC beta-lactamase resistance in S. sonnei.
The study reports the first case of plasmid-mediated CMY-2-type AmpC beta-lactamase resistance in Shigella sonnei, which conferred resistance to ceftriaxone.
Cephalosporin and ciprofloxacin resistance in Salmonella, Taiwan.
The study identified bla CMY-2 as a key determinant of extended-spectrum cephalosporin resistance in Salmonella isolates from Taiwan, along with mutations in gyrA and parC contributing to ciprofloxacin resistance.
Beta-lactam resistance and Enterobacteriaceae, United States.
The study identified bla CMY genes as the primary mechanism of extended-spectrum cephalosporin resistance in non-Typhi Salmonella, including the first report of bla CMY in E. coli O157:H7. It also detected bla SHV in a Salmonella isolate.
No comments yet. Be the first to comment!
© 2026 ResLit. Data sourced from PubMed literature analysis.
Built for antimicrobial resistance research