The study identifies the loss of tetracycline and erythromycin resistance in certain strains of the serotype 6B Icelandic clone of Streptococcus pneumoniae, indicating the potential for resistance gene inactivation or deletion.

The study identifies six alleles of the tet(M) gene in tetracycline-resistant Streptococcus pneumoniae isolates, highlighting genetic diversity within clonal lineages.

The study identified and characterized multiple tetracycline resistance genes encoding ribosomal protection proteins (RPPs) including tet(M), tet(O), tet(W), tet(Q), tet(S), tet(T), tetB(P), and otrA. These genes were detected in various bacterial species and environments, highlighting their prevalence and potential for horizontal gene transfer.

The study identifies tetM, ermB, and mefA as the primary resistance genes in multidrug-resistant group A streptococci in southern Sweden, highlighting the emergence of novel MLS resistance subphenotypes.

The study identified the tetM gene as responsible for tetracycline resistance in Mycoplasma hominis and Ureaplasma urealyticum.

The paper discusses molecular detection methods for antimicrobial resistance, focusing on genes like mecA and blaZ, which confer resistance to beta-lactam antibiotics in staphylococci.

The study characterizes the tetracycline resistance determinant tet(M) encoded on the pheromone-inducible plasmid pCF10, which was transferred between Enterococcus faecalis strains in the intestinal tract of mini-pigs.

The study identifies the VanA-type Enterococcus faecalis as the predominant clonal lineage in vancomycin-resistant Enterococci (VRE) isolated in New Zealand, highlighting the presence of vanA, ermB, and tet(M) genes associated with glycopeptide, macrolide, and tetracycline resistance, respectively.

The study identifies the tet(M) gene as the primary tetracycline resistance gene in Lactobacillus isolates from fermented dry sausages, highlighting its prevalence and genetic diversity.

The study identified tet(M), erm(B), mef(A), and mef(E) as the primary genes responsible for tetracycline and erythromycin resistance in Streptococcus pneumoniae strains.

The study describes a multiplex PCR assay for detecting nine clinically relevant antibiotic resistance genes in Staphylococcus aureus, including mecA, aacA-aphD, erm(A), erm(C), tetK, tetM, and vat genes, which confer resistance to methicillin, aminoglycosides, macrolides, lincosamides, streptogramins, tetracyclines, and quinupristin-dalfopristin.

The study characterizes the tet(M) determinant of Tn916, identifying it as a tetracycline resistance gene regulated by transcriptional attenuation.

The study identified several AMR genes in group B streptococci, including aac(6')-aph(2"), mefA, ermTR, tetM, and tetO, which confer resistance to aminoglycosides, macrolides, and tetracyclines. These genes were experimentally validated through PCR and susceptibility testing.

The study characterizes the tetracycline resistance gene tet(M) associated with the conjugative transposon Tn916, which confers resistance to tetracycline in Enterococcus faecalis.

The study identified tet(M), tet(L), and tet(S) genes as the primary tetracycline resistance mechanisms in Enterococcus isolates from food, with tet(M) being the most prevalent.

The study identified erm(B), tet(O), and tet(M) as the primary genes responsible for erythromycin and tetracycline resistance in Streptococcus agalactiae isolates from dairy cows in Brazil.

The study identified tetracycline resistance genes (tet(M) and tet(L)) and an erythromycin resistance gene (erm(B)) in Enterococcus strains isolated from an Irish artisanal cheese.

The study developed a rapid DNA extraction method combined with a two-step PCR using nested primers to detect the tet(M) gene in raw milk, demonstrating high sensitivity and speed.

The study identified tet(A), tet(B), and tet(M) as tetracycline resistance genes in Acinetobacter baumannii strains, with tet(B) additionally conferring resistance to minocycline. The efflux gene adeB was present in all strains regardless of tet gene status.

The study identified the presence of tet(M) and tet(O) genes in tetracycline-resistant Streptococcus porcinus isolates from human sources, highlighting the role of these genes in tetracycline resistance.

The study developed and validated real-time PCR assays to quantify ten major classes of tetracycline resistance genes (tet) in microbiome samples, revealing significant differences in tet gene abundance between bovine and swine manures, with swine manures showing higher levels. Composting significantly reduced tet gene abundance.

The study identified a novel mef gene subclass, mef(I), in pneumococci with efflux-mediated erythromycin resistance. It also characterized the presence of tet(M) and tet(O) genes contributing to tetracycline resistance in certain isolates.

The study developed a multiplex PCR and reverse line blot hybridization assay to detect nine antibiotic resistance-related genes in Streptococcus agalactiae, including erm(B), erm(A/TR), mef(A/E), tet(M), tet(O), aphA-3, aad-6, int-Tn, and mreA. These genes were found to be associated with resistance to macrolides, lincosamides, streptogramin B, tetracyclines, and aminoglycosides.

The study identified the presence of the mecA gene, which confers methicillin resistance, and tetracycline resistance genes tet(M) and tet(K) in Staphylococcus aureus isolates from phase 3 clinical trials of tigecycline.

The study identified tet(M) and erm(B) as the primary tetracycline and erythromycin resistance genes in enterococci from houseflies in food settings.

The study identifies and characterizes the tet(M) tetracycline resistance determinant in clinical isolates of Escherichia coli, demonstrating its functionality and mobility via conjugation.

The study identified the tet(M) gene as the primary resistance determinant in tetracycline-nonsusceptible Streptococcus pneumoniae isolates in Poland, with the majority of isolates harboring Tn916-family transposons containing this gene.

The study identifies and characterizes genetic elements carrying the erm(B) gene, which confers resistance to macrolides, lincosamides, and streptogramin B, and its association with the tet(M) gene, which confers tetracycline resistance in Streptococcus pyogenes.

The study identified tetracycline resistance genes (tet(M)), erythromycin resistance genes (erm(B)), and penicillin resistance gene (blaZ) in lactic acid bacteria isolated from poultry and swine meat products.

The study identifies methicillin-resistant Staphylococcus aureus ST398 carrying resistance genes mecA, ermA, ermC, tetM, and aph2"-aac6', indicating resistance to penicillin, erythromycin, clindamycin, oxytetracycline, and gentamicin respectively.

The study identified and characterized seven tetracycline resistance genes (tet(M), tet(O), tet(Q), tet(W), tet(C), tet(H), and tet(Z)) in lagoons and groundwater near swine production facilities over a 3-year period. These genes were consistently detected in groundwater and lagoon samples, with varying frequencies and concentrations depending on the location and sampling time.

The study identifies various AMR genes in Enterococcus faecalis, including blaZ, ermB, tetM, and vanA, which confer resistance to beta-lactams, macrolides, tetracyclines, and glycopeptides, respectively.

The study found that high concentrations of chlortetracycline (CTC) selected for increased tetracycline resistance in aerobic bacterial populations, with a greater diversity of tet resistance genes detected in the high-CTC chemostat compared to low-CTC and control chemostats.

The study identified erythromycin resistance genes erm(B), erm(A), and mef(A), and tetracycline resistance gene tet(M) in group B streptococci (GBS) in Italy. Erythromycin resistance was predominantly associated with serotype V and the PFGE type 1/CC1 group.

The study identifies the tet(M) gene as a major tetracycline resistance determinant in enterococci isolated from ready-to-eat food, highlighting its potential role in the transmission of antibiotic resistance to the human digestive tract.

The study identified ermB and tetO as the primary erythromycin and tetracycline resistance genes in enterococci from both bison and cattle, with tetM also found in some bison isolates. Ciprofloxacin resistance was noted but not linked to specific mutations.

The study identified and characterized erm(B)-carrying transposons in tetracycline-resistant pneumococci, showing that Tn1545 and Tn6003 have similar resistance gene combinations, including erm(B), tet(M), and aphA-3. It also revealed that Tn6002 was the most common transposon among the isolates.

Three L. paracasei strains from cheese showed acquired resistance to tetracycline and/or erythromycin, linked to the presence of tet(M), tet(W), and erm(B) genes.

The study identifies several AMR genes and mutations associated with resistance to penicillin, tetracycline, and fluoroquinolones in Neisseria gonorrhoeae, including bla TEM-1, tet (M), and various mutations in penA, penB, mtrR, ponA, rpsJ, gyrA, and parC.

The study identifies a novel transposon, Tn6009, which contains the tet(M) gene linked to the Staphylococcus aureus mer operon, conferring resistance to tetracycline and mercury.

The study demonstrates the transfer of antibiotic resistance marker genes, specifically erm(B) and tet(M), between lactic acid bacteria in both in vitro and in vivo models, highlighting the potential for horizontal gene transfer in natural environments.

The study identified a novel deletion in the L4 protein of an erythromycin-resistant Ureaplasma isolate and a point mutation in the ParC subunit of a ciprofloxacin-resistant isolate. Additionally, the tetM gene was found in a tetracycline-resistant isolate.

The study identifies the tet(M) gene associated with the Tn916 conjugative transposon in tetracycline-resistant Lactobacillus paracasei strains, which can transfer to Enterococcus faecalis.

The study demonstrates the intra- and interspecies conjugal transfer of Tn916-like elements carrying the tet(M) gene from Lactococcus lactis to Enterococcus faecalis, highlighting the potential for horizontal gene transfer of tetracycline resistance.

The study identified methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant coagulase-negative Staphylococcus (MRCoNS) isolates carrying resistance genes erm(A), tet(M), and tet(K) from marine environments along the US West Coast.

The study identified tetracycline resistance genes (tet(M), tet(W), tet(Q)) and erythromycin resistance genes (ermB, ermF) in the vaginal microbiota of primates not typically exposed to antibiotics, indicating the presence of antibiotic resistance genes in these animals despite limited antibiotic exposure.

The study identifies several AMR genes and mutations in the MRSA strain TW20, including mecA for methicillin resistance, qacA for antiseptic resistance, Tn554 and ermA1 for streptomycin and erythromycin resistance, BlaZ for beta-lactam resistance, TetM for tetracycline resistance, and DfrG for trimethoprim resistance. Additionally, a point mutation in GyrA (Ser84Leu) confers quinolone resistance.

The study identified antimicrobial resistance genes erm(B), erm(A), linB, tet(M), and tet(O) in bovine group C streptococci, indicating their potential role in multidrug resistance and horizontal gene transfer.

The study identifies multiple antimicrobial resistance genes and mutations in MRSA strains causing a skin lesion in a Spanish patient, including mecA, tetK, tetL, tetM, ermA, ermB, ermC, msrA, aph(2')-acc(6'), ant(4')-Ia, aph(3')-III, and dfrK, along with quinolone resistance mutations in grlA and gyrA.

The study identifies multiple antibiotic resistance genes in Streptococcus mitis B6, including tetM, aacA-aphD, aphA, sat, and aadE, which confer resistance to tetracycline and aminoglycosides. Additionally, a mutation in rpoB (H486N) was found to confer rifampicin resistance.

The study identifies tetracycline resistance genes tet(M) and tet(K), as well as the methicillin resistance gene mecA in the ST398 MRSA isolate S0385, highlighting its multidrug resistance profile.

Three functional copies of Tn916-like elements containing tet(M) were identified in the clinical Enterococcus faecium isolate C68, conferring resistance to tetracycline and minocycline.

The study identified the tet(M) gene as the primary tetracycline resistance mechanism in Clostridium difficile PCR ribotype 078 isolates, with all tetracycline-resistant strains containing a Tn916-like transposon carrying this gene.

The study identified various AMR genes including erm(B), linB, lnuD, tet(M), tet(S), and tet(O) associated with resistance to macrolides, lincosamides, and tetracyclines in bovine isolates of Streptococcus agalactiae, S. dysgalactiae subsp. dysgalactiae, and S. uberis.

The study reports MRSA ST398 isolates with resistance to beta-lactams, tetracycline, clindamycin, ciprofloxacin, and levofloxacin, carrying mecA, tetK, tetM, and vga(A) genes, along with gyrA(S84L) and parC(S80F) mutations.

The study reports the presence and expression of tet(L) in Streptococcus suis strains and highlights the co-expression of multiple tetracycline resistance genes contributing to high MIC levels against tetracycline.

The study identifies tet(M) and erm(B) as the most common resistance genes in enterococci from insects and swine feces, highlighting their role in multidrug resistance.

The study identifies the tet(M) gene as the cause of tetracycline resistance in a clonal outbreak of Streptococcus pyogenes emm44 among homeless individuals in Rennes, France.

The study identified tetracycline resistance genes tet(M), tet(O), and tet(L), and erythromycin resistance gene erm(B) in Streptococcus suis serotype 2 strains isolated from slaughterhouse pigs in southern Vietnam.

The study identifies various mef subclasses (mef(E), mef(I), mef(A/E), and a novel mef) associated with resistance genes (tet(M), tet(O), and catQ) in Streptococcus pyogenes, highlighting the diversity of genetic elements involved in macrolide and tetracycline resistance.

The study identifies tetracycline resistance genes tet(M) and tet(W), and erythromycin resistance gene erm(B) in Lactobacillus paracasei strains isolated from Italian dairy and meat products.

The study identified several antibiotic resistance genes in Staphylococcus aureus isolates from Nigeria, including aacA-aphD, ermA, mecA, tetK, and tetM, which confer resistance to gentamicin, erythromycin, oxacillin, and tetracycline. High levels of resistance to tetracycline and trimethoprim/sulfamethoxazole were observed.

The study identified the tetM gene as a common tetracycline resistance determinant among Streptococcus pneumoniae isolates from the Gambia.

The study identifies the presence of methicillin-resistant Staphylococcus aureus (MRSA) in slaughter pigs in Switzerland, highlighting the emergence of the unusual sequence type ST49. It reports various AMR genes such as mecA, blaZ, tet(M), tet(K), erm(A), erm(C), ant(9)-Ia, str, dfr(G), and vga(A)v, which confer resistance to β-lactams, tetracycline, macrolides, lincosamides, streptogramins B, spectinomycin, streptomycin, trimethoprim, and tiamulin.

The study identified various tetracycline resistance genes, including tet(M), tet(L), erm(T), tet(W), tet(O), and tet(X), in the gut microbiota of a mother and her infant. It also discovered a novel composite transposon, Tn 6079, carrying tet(M), tet(L), and erm(T) in the infant's gut, highlighting the potential for horizontal gene transfer and maternal transmission of antibiotic resistance.

The study identifies the tetracycline resistance genes tet(M) and tet(L) on a 19.6-kb plasmid from a dairy Enterococcus faecium isolate, demonstrating their functionality and transmissibility.

The study identified the presence of tetracycline resistance gene tet (M), erythromycin resistance gene ermB, sulfonamide resistance gene sul2, and beta-lactam resistance gene bla TEM in the gut microbiota of infants, indicating that antibiotic resistance genes are present in the human gut microbiota from an early age.

The study identified aac(6')-aph(2') as a gene conferring gentamicin resistance in Enterococcus faecalis and Enterococcus faecium, tet(M) as a determinant of tetracycline resistance, and mutations in gyrA and pbp5 genes associated with ciprofloxacin and ampicillin resistance, respectively.

The study identified bla TEM-1, cfx A, tet M, tet W, and tet Q as the most prevalent antibiotic resistance genes in endodontic infections. bla TEM-1 was more prevalent in primary infections, while tet M remained unchanged after treatment. Vancomycin resistance genes were not detected.

The study identified genic differences in the blp bacteriocin locus and erythromycin resistance genes among PMEN1 strains, contributing to variations in virulence and antibiotic resistance.

The study identified numerous antibiotic resistance (AR) genes in gulls, including both known and previously undescribed ones. It highlights the significant diversity of AR genes in gulls, emphasizing their potential role in spreading resistance genes between human and environmental habitats.

The study characterizes several tetracycline resistance genes, including tet(M), tet(K), tet(B), tet(A), and tet(X), demonstrating their roles in conferring resistance to tetracycline and related antibiotics.

The study identifies several AMR genes on the plasmid pAQU1, including bla CARB-9 -like, floR, mef (A)-like, sul2, tet (M), and tet (B), which confer resistance to various antibiotics such as carbenicillin, chloramphenicol, florfenicol, erythromycin, sulfonamide, and tetracycline.

The paper discusses various virulence factors and mechanisms contributing to the pathogenicity and antibiotic resistance of Acinetobacter baumannii, including biofilm formation, surface polysaccharides, and outer membrane proteins.

The study identified several antibiotic resistance genes in staphylococcal isolates, including mecA for methicillin resistance, aac(6')/aph(2"), aph(3')-IIIa, and ant(4')-Ia for gentamicin resistance, ermA, ermB, ermC, and msrA for erythromycin resistance, tetK and tetM for tetracycline resistance, and blaZ for penicillin resistance.

The study identified ermA, ermC, tetM, and tetK as essential genes for erythromycin and tetracycline resistance in MRSA strains from a Malaysian hospital.

The study identifies and characterizes novel SCCmec-SCCM1 composite islands in MRSA isolates, highlighting the presence of various AMR genes such as blaZ, erm(A), aadD, qacA, qacC, merA, merB, fosB, sdrM, aacA-aphD, far1 (fusB), Q6GD50 (fusC), and cat-pC194 (pMC524).

The study identifies several antibiotic resistance genes in S. pseudintermedius ED99, including bla operon, aad6-sat4-aphA-3, ermB, and tetM, which confer resistance to beta-lactams, aminoglycosides, macrolides, lincosamides, streptogramins, and tetracyclines.

The study identified multiple variants of the tetracycline resistance gene tet(M) in Clostridium difficile strains from a single calf farm, with varying resistance profiles to tetracycline and erythromycin.

The study elucidates the structural basis of TetM-mediated tetracycline resistance, revealing how TetM interacts with the ribosome to displace tetracycline and confer resistance.

The study identified the ermB and tetM genes as the primary factors contributing to erythromycin and tetracycline resistance in Streptococcus pneumoniae isolates from pediatric patients in Beijing. Additionally, the mec gene was found to be associated with erythromycin resistance.

The study identified various AMR genes in nasal Staphylococcus aureus isolates from donkeys, including blaZ, erm(A), erm(C), tet(M), and fusC, which confer resistance to penicillin, erythromycin, tetracycline, and fusidic acid.

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 identified several AMR genes and mutations associated with drug resistance in S. aureus, including blaZ, mecA, tet, tetM, aacA-aphD, and mutations in rpsL, rpsJ, grlA, and gyrA.

The study identified tetracycline resistance genes tet(M) and tet(O), the erythromycin resistance gene erm(B), and the streptomycin resistance gene aadA in Streptococcus canis isolates, highlighting the presence of antimicrobial resistance mechanisms in this species.

The study identified the presence of erm(B), mef(A), and tet(M) genes in Enterococcus faecium isolates from hospital and retirement home effluents, contributing to macrolide and tetracycline resistance.

The study identified tetracycline resistance genes (tet(M), tet(O), tet(Q), and tet(W)) in the microbiota of newborns and their mothers, highlighting differences in gene prevalence based on delivery mode.

The study identified tet(M) and erm(B) as key resistance genes in C. difficile PCR-ribotype 078 isolates, along with gyrA mutations contributing to fluoroquinolone resistance.

The study identified multiple antibiotic resistance genes in environmental MRSA isolates, including aadD, erm(A), erm(C), msr(A), tet(K), and tet(M), which confer resistance to kanamycin, erythromycin, clindamycin, and tetracycline. These genes were found in a high proportion of the isolates, indicating that environmental MRSA can serve as reservoirs for antibiotic resistance genes.

The study shows that oral administration of antibiotics leads to higher levels of antibiotic resistance gene pools in the gut microbiota compared to intravenous administration. Specifically, the tet(M) gene and blaCMY-2 gene were found to confer resistance to tetracycline and ampicillin, respectively.

The study identified two Tn 916-like, tet(M)-containing elements in pneumococci isolated in 1967 and 1968, and a novel composite ICE, ICE Sp PN1, in a pneumococcus isolated in 1972. These elements contained genes conferring resistance to tetracycline and chloramphenicol.

The study identifies tetracycline resistance genes tet(M), tet(K), and tet(O) in Staphylococcus pseudintermedius isolates and proposes canine-specific breakpoints for doxycycline susceptibility testing.

The study identifies a novel pseudo-staphylococcal cassette chromosome mec element (ψSCCmec57395) in methicillin-resistant Staphylococcus pseudintermedius CC45, along with various AMR genes such as mecA, blaZ, aac(6')-Ie–aph(2')-Ia, aph(3')-III, ant(6)-Ia, sat4, erm(B), tet(M), dfr(G), and cat pC221. Additionally, fluoroquinolone resistance was linked to specific mutations in gyrA and grlA.

The study identified several AMR genes in MRSA and MSSA isolates, including ermC, tetK, tetM, blaZ, msrA, and ermA, which confer resistance to clindamycin, tetracycline, penicillin, and erythromycin. These findings highlight the genetic basis of antimicrobial resistance in S. aureus isolates from military personnel in the US and Afghanistan.

The study identified the tetracycline resistance gene tetM in camel-derived Streptococcus agalactiae, which was associated with tetracycline resistance and located on a Tn916-like element.

The study identified the tet(M) gene as the primary cause of tetracycline resistance in Listeria isolates, along with dfrA, dfrD, and dfrG genes responsible for trimethoprim resistance. Additionally, the transferability of these resistance genes via conjugative transposons and plasmids was demonstrated.

The study identified multiple AMR genes in Enterococcus faecium isolates from wastewater, marine outfalls, and river environments, including pbp5, aac(6')-Ie-aph(2"), ant(6')-Ia, tet(M), and tet(L). Mutations in gyrA (S84R) were associated with ciprofloxacin resistance.

The study identified several antibiotic resistance genes, including aac(6')-aph(2"), ermC, msrA, tetK, tetM, and mecA, in faecal isolates of coagulase-negative staphylococci from Nigeria. These genes were associated with resistance to gentamicin, erythromycin, and tetracycline, as well as methicillin resistance.

The study identifies tetM as a gene specifically induced by spermine and tetracycline in Staphylococcus aureus, although it does not confer resistance to spermine.

The study identifies pAQU group plasmids that can transfer the tetracycline resistance gene tet(M) to E. coli, highlighting their potential role in spreading antibiotic resistance in marine environments.

The study identified the presence of tet(M) and erm(B) genes in lactic acid bacteria (LAB) isolated from pharmaceutical and dairy products, indicating tetracycline and erythromycin resistance, respectively.

The study identified the vanA gene as the primary determinant of vancomycin and teicoplanin resistance in Enterococcus faecium outbreaks. Additional resistance genes such as erm(B), tet(M), aac(6')-Ie-aph(2'')-Ia, aph(3')-IIIa, and aad6 were also characterized, contributing to multidrug resistance.

The study identified multiple AMR genes in MRSA isolates from bovines, including blaZ, blaI, blaR, tetM, ermC, aacA-aphD, aadD, aphA3, cat, sdrM, and fosB, which confer resistance to penicillin, tetracycline, erythromycin, gentamicin, kanamycin, chloramphenicol, and fosfomycin.

The study identifies the tetracycline resistance gene tet(M) in Escherichia coli isolates from pigs, showing its presence on plasmids and its potential for horizontal transfer from enterococci.

The study identified mutations in gyrA and gyrB genes associated with ciprofloxacin resistance, and the presence of tetM and ermB genes conferring resistance to tetracycline and clindamycin, respectively, in Clostridium difficile isolates.

The study identifies the emergence of a multidrug-resistant Streptococcus pneumoniae serotype 8-ST63 clone in Spain, characterized by the presence of ermB and tetM genes, and mutations in parC and gyrA that confer resistance to fluoroquinolones.

The paper discusses various rapid antimicrobial resistance testing methods, including molecular techniques like qPCR, DNA microarrays, Luminex xMAP, and next-generation sequencing (NGS), highlighting their roles in detecting resistance genes such as blaCTX-M, blaTEM, blaSHV, blaKPC, blaNDM, blaOXA-48, blaVIM, blaIMP, mecA, mecC, vanA, vanB, aacA-aphD, tetK, tetM, ermA, ermC, vatA, vatB, and vatC in different bacterial species.

The study identifies tetracycline resistance determinant tetM and aminoglycoside resistance determinant aphA1 in Clostridium difficile 078 isolates from humans and pigs, indicating shared antimicrobial resistance mechanisms between human and animal strains.

The study identifies tetM, ermB, and mefE as genes responsible for tetracycline and macrolide resistance in nonencapsulated Streptococcus pneumoniae isolates, highlighting the antibiotic resistance profile of the classic lineage ST344 and ST448.

The study identified the presence of tet(L), tet(M), and tet(S) genes in food-borne Enterococcus faecalis isolates, highlighting their role in tetracycline resistance and the potential for horizontal gene transfer via aggregation substances and pheromone-mediated conjugation.

The study identified tetracycline resistance genes tet(A), tet(M), and tet(S) in bacterial isolates from Iranian fish farms, with tet(S) being the most prevalent.

The study identified several antimicrobial resistance genes in Enterococcus faecalis isolated from retail chicken products in Japan, including aac(6')-Ie-aph(2")-Ia, aph(3')-IIIa, ant(6)-Ia, tet(L), tet(M), tet(O), and erm(B). These genes were associated with resistance to various antibiotics such as kanamycin, gentamicin, streptomycin, dihydrostreptomycin, oxytetracycline, and erythromycin.

The study identified ermTR and ermT genes associated with macrolide resistance, and tetM gene associated with tetracycline resistance in serotype IV group B Streptococcus strains.

The study demonstrates the phage-mediated transfer of the Staphylococcus aureus genomic island νSaβ, which includes the tetracycline resistance gene tetM and the chloramphenicol resistance gene cat.

The study identifies deletions in the 5'-UTR of tetM that lead to constitutive overexpression of TetM, conferring tigecycline resistance in Enterococcus faecalis.

The study found that tylosin phosphate administration increased the proportion of erythromycin and tylosin resistant enterococci, but withdrawal reduced their prevalence. The resistance was primarily mediated by the erm(B) gene and msrC gene.

The study identified several antibiotic resistance genes in swine fecal samples using qPCR, including tetracycline resistance genes (tet(A), tet(B), tet(C), tet(M), tet(O), tet(W)), erythromycin resistance genes (ermB, ermF), sulfonamide resistance genes (sulI, sulII), beta-lactam resistance genes (blaCTX-M-1 group, blaCMY-2, blaSHV family), and glycopeptide resistance gene (vanA).

The study identified the tetracycline resistance gene tetM and the macrolide/lincosamide resistance gene ermTR in serotype IV Group B Streptococcus (GBS) strains, which are responsible for the emergence of invasive disease in Manitoba and Saskatchewan, Canada.

The study found that Haemophilus ducreyi cutaneous ulcer (CU) strains are nearly identical to class I genital ulcer (GU) strains and are highly susceptible to antibiotics, including azithromycin. Resistance mechanisms in GU strains included beta-lactamase (blaTEM-1B) and tetracycline resistance genes (tet(B), tet(32), tet(M)).

The study identified erm(TR) as a cause of high-level erythromycin resistance and tet(M) as a cause of tetracycline resistance in Helcococcus kunzii.

The study found that housefly larva vermicomposting significantly reduces the abundance of tetracycline resistance genes (tet(M), tet(O), tet(Q), tet(W)) and increases the abundance of sulfonamide resistance genes (sul1, sul2) in swine manure. It also observed changes in the bacterial community structure, with a significant decrease in the diversity and richness of bacteria.

The study analyzed invasive pneumococcal disease (IPD) isolates from children before and after PCV13 implementation, focusing on strain distributions, resistance features, and genetic characteristics. Key findings include the significant reduction in PCV13-targeted serotypes and the identification of resistance mechanisms associated with specific serotypes and clonal complexes.

The study identified multiple antimicrobial resistance genes in methicillin-resistant staphylococci isolated from pigs in Nigeria, including mecA, blaZ, erm(C), erm(B), str, tet(K), tet(M), tet(L), dfrG, dfrK, aacA/aphD, aphA3, cat pC221, and cat pC223. Additionally, a Ser84Leu mutation in the gyrA gene was found to confer ciprofloxacin resistance.

The study identified the tet(M) tetracycline resistance gene in three Ureaplasma isolates and ciprofloxacin resistance mutations in two isolates, highlighting low levels of antibiotic resistance among Ureaplasma species in England and Wales.

The study identified the presence of antibiotic resistance genes blaZ, mecA, tetK, and tetM in Staphylococcus aureus isolates from healthy ruminants, highlighting the potential reservoir of antimicrobial-resistant S. aureus in nasal carriage.

The study identifies multiple AMR genes in CC97 MRSA isolates from Italian dairy cattle and pigs, including erm(B), erm(C), vga(A), tet(K), tet(M), blaZ, and aacA-aphD, which confer resistance to various antibiotics such as erythromycin, clindamycin, tiamulin, tetracycline, penicillin, and aminoglycosides.

The study shows that multi-drug resistance plasmids pAQU1 and IncFIB can persist in bacterial populations under very low selective pressure, including in non-culturable states. The plasmids retain their resistance genes, such as tet(M), tet(B), floR, mph(A)-like, mef(A)-like, and sul2, which confer resistance to tetracycline, florfenicol, macrolides, and sulfonamides.

The study identified multiple antimicrobial resistance genes in Staphylococcus epidermidis isolates from urinary tract infections in Pakistan, including tetM, tetK, aac(6')/aph(2"), aacA-aphD, ermA, blaZ, mecA, MeccA, and blaTEM-1, indicating widespread multidrug resistance.