The study developed and validated PCR primers for detecting tetracycline efflux genes in gram-negative bacteria, identifying multiple tet genes in swine feed, feces, and groundwater, highlighting the spread of tetracycline resistance in agricultural environments.

The study identified multiple tetracycline resistance genes (tet(A), tet(W), tet(C), tet(J), tet(L), tet(D), tet(Y), and tet(K)) in environmental bacteria from an oxytetracycline production wastewater treatment plant and the receiving river, highlighting the widespread dissemination of these genes in aquatic environments exposed to high levels of antibiotic residues.

The study identifies eight tetracycline resistance genes (tetB, tetC, tetD, tetH, tetL, tetY, tetM, and tetW) in the gut microbiota of honeybees, highlighting the accumulation of resistance determinants due to long-term antibiotic exposure in beekeeping practices.

The study identifies various AMR genes in Salmonella enterica, Escherichia coli, and Enterococcus spp. isolated from U.S. food animals, including aac(3'), aac(6'), aadA, aadA1, aadA2, aadA12, aphAI, aph(3')-Ii-iv, strA, strB, bla CMY-2, bla TEM-1, bla PSE-1, floR, cmlA, cat1, cat2, sul1, sul2, dfr1, dfrA10, tet(A), tet(B), tet(C), tet(D), tet(G), and tetR.

The study reports the draft genome sequence of a multidrug-resistant Morganella morganii isolate carrying the qnrD1 gene, along with various other antibiotic resistance genes such as aadA1y, aph(3')-Ic, strA-strB, blaOXA-1, catA2, catB3, sul2, dfrA1, tetY, and sat2.

The study identifies carbapenem-resistant Acinetobacter indicus-like isolates from cattle carrying the blaOXA-23 gene, along with various other AMR genes such as aac(3)-IIa, strA/B, aph(3')-Ic, sul2, floR, tet(A), tet(Y), aadA1, aadB, sul1, and tet(X).

This study identified several antimicrobial resistance genes in Pasteurella multocida, including aminoglycoside, beta-lactam, tetracycline, macrolide, and sulfonamide resistance genes, highlighting the diverse resistance mechanisms present in this pathogen.

The study identified tetracycline resistance genes tetW and tetY, and sulfonamide resistance genes sul1 and sul2 in the honeybee gut microbiota, which increased in abundance following antibiotic treatment.

The study identified various antimicrobial resistance genes (ARGs) in metagenomic sequencing data from chronically ill feedlot cattle, including genes conferring resistance to beta-lactams, aminoglycosides, macrolides, phenicols, tetracyclines, and trimethoprim. Notably, tetH was the most frequently detected resistance gene, and several ARGs were found to be associated with integrative and conjugative elements (ICEs).

The study identified ESBL/AmpC-producing E. coli on a dairy farm, with a high prevalence in calves. Key resistance genes included blaCTX-M-1, blaCTX-M-15, floR, strA, strB, catA, aadA, dfrA, tetA, tetR, tetY, mph(A), and TEM-105.

The study identified several AMR genes in Yersinia enterocolitica isolates from Ningxia, China, including aph(6)-Id, aph(3")-Ib, sul2, tet(A), tet(Y), and y56, which confer resistance to various antibiotics such as ampicillin, streptomycin, trimethoprim/sulfamethoxazole, tetracycline, and others. These genes were validated through whole-genome sequencing and resistance gene prediction.

The paper discusses the prevalence and mechanisms of antimicrobial resistance, focusing on tetracycline resistance genes such as tetA, tetB, tetC, tetD, tetE, tetI, and tetY in Escherichia coli. These genes are associated with efflux mechanisms that contribute to resistance against tetracycline.

The study identifies several efflux pumps, outer membrane permeability alterations, and antibiotic target modifications as key mechanisms of tigecycline resistance in Acinetobacter baumannii.

The study identifies several AMR genes and mutations associated with streptomycin, kasugamycin, gentamicin, and oxytetracycline resistance in plant pathogenic bacteria, highlighting the role of Tn 5393 and other mobile genetic elements in the dissemination of these resistance traits.

The paper reviews the molecular mechanisms of tigecycline resistance in Enterobacterales, highlighting the roles of efflux pumps, tet genes, and other resistance mechanisms. It identifies several tigecycline resistance genes, including tet(X), tet(X1), tet(X2), tet(X3), tet(X4), tet(M), tet(A), tet(B), tet(Y), and others, along with their associated resistance profiles.

The study found that doxy-PEP use over 6 months significantly increased the proportion and expression of tetracycline resistance genes in the gut microbiome, with no significant changes in other antibiotic resistance gene classes.

The study identified multiple antimicrobial resistance genes and mutations in multidrug-resistant Pasteurella multocida isolates from bovine respiratory disease-affected animals in Spanish feedlots, highlighting the role of mobile genetic elements in the spread of resistance.

The study identifies a novel insertion sequence, ISApl4, and a pseudo-compound transposon, Tn7560, which carries four AMR genes: sul2, strA-strB, and tet(Y), contributing to multidrug resistance in Actinobacillus pleuropneumoniae.

Arsenic and microplastics significantly influenced the spread of antibiotic resistance genes (ARGs) during vermicomposting, with specific genes like bla ampC, bla LRA-1, bla FEZ-1, aph(3′)-II, ermB, vanY, mefA, catA, tetX4, bla IMP-11, aadK, ant(3′)-Ih-aac(6′)-Id, ermG, bla OXA-119, tetR, vatE, smeE, mexD, bla OXA-3, amrB, tetY, class A beta-lactamase, dfrA1, alanine adenosyltransferase JOHN-1, mdtB, mdtE, and erm-41 being enriched under various treatment conditions.