The study identifies several β-lactam resistance genes, including ampC, lacA, pbp2, pbp3, pbp4a, pbp6a, and pbp7, as well as multidrug efflux pumps such as acrAB-tolC, acrAD-tolC, mdtABC-tolC, emrAB-tolC, mexAB-oprM, and others. Additionally, genes like bacA, ksgA, crcB, and rarD are implicated in resistance to bacitracin, kasugamycin, streptomycin, camphor, and chloramphenicol, respectively.

The study identified Vibrio vulnificus EPL 0201 biotype 2 as a multidrug-resistant strain with high pathogenicity, possessing virulence factors vvhA, rtxA, and wza, as well as resistance genes such as H-NS, TEM-1, sul1, tet, floR, parE, mprF, APH(6)-Id, APH(3'')-Ib, aadA16, and arr-3.

WYBQ-4 is a new bactericidal agent with potent activity against methicillin-resistant Staphylococcus aureus (MRSA). It binds to penicillin-binding proteins (PBPs), including PBP1, PBP2, PBP3, PBP4, and PBP2a, and interferes with cell wall synthesis, leading to bacterial cell death.

The study identified the VIM-4 metallo-beta-lactamase as a key factor in carbapenem resistance in Pseudomonas aeruginosa strain CCUG 51971, contributing to high resistance levels against imipenem and meropenem.

The study identified bla PDC, bla OXA-50, bla OXA-50-like, bla KPC-2, and bla OXA-486 as key resistance genes in imipenem-nonsusceptible Pseudomonas aeruginosa isolates. Additionally, mutations in PBP3 (F533L) and disruptions in oprD were associated with resistance. The ST463 lineage was highlighted as a multidrug-resistant and hypervirulent strain.

The study identified multiple antibiotic resistance genes in M. morganii strain UM869, including KpnH, PBP3, rsmA, CRP, gyrB, and qacG, which confer resistance to various classes of antibiotics such as fluoroquinolones, aminoglycosides, carbapenems, cephalosporins, and macrolides.

The study identifies PBP3 mutations (T526S, A515V, G523V, H370Y) and an AdeJ G288S mutation as key contributors to resistance against sulbactam and sulbactam-durlobactam in Acinetobacter baumannii isolates.

The study identifies a four amino-acid insertion (YRVP) in the PBP-3 of an E. coli strain, which contributes to resistance against broad-spectrum cephalosporins and aztreonam without the production of any acquired broad-spectrum β-lactamase.

The study identifies multiple antibiotic resistance genes in E. coli WG5D, including multidrug efflux pumps and genes conferring resistance to various antibiotics such as fluoroquinolones, cephalosporins, and glycopeptides.

The study identified a multidrug-resistant hypermucoviscous Klebsiella variicola strain LL2208 isolated from Chinese longsnout catfish, which exhibits resistance to various antibiotics including penicillins, macrolides, amphenicols, lincosamides, and glycopeptides. The strain possesses 30 antimicrobial resistance genes, including blaLEN-16, ompK37, pbp3, and vanG.

The study identified 64 AMR genes and 177 virulence factor genes in the E. coli strain JS01, highlighting its multidrug resistance and high pathogenicity.

The study identifies 42 antimicrobial resistance (AMR) genes in the pan-drug resistant Klebsiella pneumoniae isolate KPNW, including beta-lactamases (bla CTX-M-15, bla NDM-1, bla OXA-1, bla TEM-63, bla TEM-104, bla SHV-28), tetracycline resistance genes (tet(A)), and efflux pump genes (oqxA, oqxB, marA, marR, ompK37, pbp3, crp, h-ns, kpnG, kpnH, parC, rsmA). Additionally, the isolate shows resistance to polymyxin B and colistin through modifications in lipid A (eptB, arnT, lptD, msbA, vanG) and other mechanisms.

The paper reviews molecular resistance mechanisms to newly approved antibiotics in WHO priority pathogens, identifying various beta-lactamases, efflux pumps, and target site modifications that confer resistance.