The study identifies mutations in penicillin-binding protein genes (pbp2x, pbp2b, pbp1a) and the murMN resistance determinant as contributors to amoxicillin and penicillin resistance in Streptococcus pneumoniae isolates.

The study identifies 51 loci, including 301 SNPs, associated with beta-lactam non-susceptibility in Streptococcus pneumoniae, focusing on genes involved in peptidoglycan biosynthesis and other pathways.

The study validated a high-throughput multiplex genetic detection system (HMGS) for identifying, quantifying, and analyzing virulence and drug resistance genes in Helicobacter pylori. Four drug resistance genes (23S rRNA, rdxA, gyrA, and pbp1A) were characterized for their roles in resistance to clarithromycin, metronidazole, levofloxacin, and amoxicillin, respectively.

The study identifies numerous genes and mutations associated with antibiotic resistance in Streptococcus pneumoniae through genome-wide association studies, highlighting the genetic basis of resistance to penicillin, trimethoprim, cotrimoxazole, erythromycin, and fluoroquinolones.

The study identified multiple antimicrobial resistance genes in Enterococcus hirae R17, including genes conferring resistance to beta-lactam antibiotics, lincosamides, streptogramins, pleuromutilins, polymyxins, tetracyclines, and others. Notably, the strain exhibited resistance to bacitracin, ciprofloxacin, daptomycin, erythromycin, and tetracycline.

The study identified that meropenem resistance in Streptococcus pneumoniae serotype 15A-ST63 clones in Japan is primarily due to recombination events involving the pbp1a and pbp2b genes, leading to modifications in penicillin-binding proteins.

The study identified genetic determinants of antibiotic resistance in Cambodian Helicobacter pylori clinical isolates, including mutations in 23S rRNA for clarithromycin resistance, gyrA for levofloxacin resistance, pbp1 for amoxicillin resistance, and rdxA for metronidazole resistance.

The study identified various AMR genes and mutations in H. pylori isolates, including 23S rRNA mutations for clarithromycin resistance, gyrA mutations for levofloxacin resistance, pbp1, pbp2, and pbp3 mutations for amoxicillin resistance, rdxA mutations for metronidazole resistance, 16S rRNA mutations for tetracycline resistance, and rpoB mutations for rifampin resistance.

The study identified antibiotic resistance genes rdxA, pbp1A, gyrA, and cla in Helicobacter pylori isolates from raw meat, contributing to resistance against metronidazole, amoxicillin, levofloxacin, and clarithromycin.

The study identifies pbp2b, pbp2x, and pbp1a as key genes contributing to meropenem resistance in Streptococcus pneumoniae, along with ermB, tetM, and cat as resistance genes. Mutations in PBP2b, PBP2x, and PBP1a were linked to increased meropenem resistance.

The study identified several genes and mutations associated with antimicrobial resistance in Helicobacter pylori clinical isolates from the Democratic Republic of Congo, including pbp1A, 23S_rRNA, gyrA, gyrB, rdxA, and frxA, which are linked to resistance against amoxicillin, clarithromycin, levofloxacin, and metronidazole.

The study identified mutations in the pbp1a gene of H. pylori isolates from Nigeria and South Africa that contribute to amoxicillin resistance. These mutations were found to result in low-level resistance, but not high-level resistance.

The study identified that nonencapsulated Streptococcus pneumoniae (NESp) strains can acquire capsule and become more virulent during systemic infection. It also showed that recombination events in NESp strains can lead to the acquisition of beta-lactam resistance genes such as pbp1a and pbp2x.

In vitro-induced drug resistance in Streptococcus agalactiae (CVCC1886) and Streptococcus dysgalactiae (CVCC3701) resulted in resistance to multiple antibiotics. Resistance genes such as GyrA, GyrB, Pbp1a, and Pbp2b were identified, which conferred resistance to quinolones and beta-lactams. The virulence of the resistant strains was reduced compared to the wild-type strains.

The study identified multiple AMR genes and mutations in pneumococcal strains from Myanmar, including genes conferring resistance to azithromycin, tetracycline, chloramphenicol, and quinolones, as well as mutations in penicillin-binding proteins and DNA gyrase. These findings highlight the spread of AMR in pneumococcal strains in Myanmar.

The study compared culture-based and molecular-based susceptibility testing for six antibiotics in H. pylori using clinical isolates and formalin-fixed, paraffin-embedded gastric biopsies. It found that next-generation sequencing accurately predicted resistance to clarithromycin, levofloxacin, rifabutin, and tetracycline, while showing fair agreement for metronidazole and amoxicillin.

The study shows that H-NS regulates the expression of antibiotic resistance genes in Acinetobacter baumannii, leading to increased resistance to beta-lactam antibiotics, aminoglycosides, quinolones, chloramphenicol, trimethoprim, sulfonamides, and colistin.

The study identified several mutations in genes associated with antibiotic resistance in Helicobacter pylori isolates from Myanmar, including pbp1-A for amoxicillin, 23S rRNA for clarithromycin, gyrA and gyrB for levofloxacin, and rdxA and frxA for metronidazole.

The study identified mutations in 23S rRNA, PBP-1A, gyrA, and rdxA genes in H. pylori strains, which were associated with resistance to clarithromycin, amoxicillin, levofloxacin, and metronidazole, respectively.

The study identified mutations in GyrA, GyrB, Pbp1, rdxA, and 23S rRNA as the genetic determinants of resistance to levofloxacin, amoxicillin, metronidazole, and clarithromycin in Helicobacter pylori clinical isolates.

The study identifies pbp2x, pbp2b, pbp1a, and murM as the main resistance determinants for amoxicillin resistance in Streptococcus pneumoniae, demonstrating that the order of allele uptake is important for successful resistance evolution.

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 reports the first identification of amoxicillin resistance in Helicobacter pylori isolates from Malaysian patients, with specific mutations in the pbp1A gene contributing to this resistance.

The paper discusses the mechanisms of antibiotic resistance in Helicobacter pylori, focusing on genes and mutations associated with resistance to amoxicillin, clarithromycin, furazolidone, levofloxacin, and metronidazole. Key findings include the identification of specific mutations in 23S rRNA, gyrA, gyrB, PBP1A, porD, oorD, RdxA, and other genes that contribute to resistance against these antibiotics.

The study identifies several antibiotic resistance genes, including mecA, blaz, pbp-4, pbp-1, blaTEM, blaCMY, and blaSHV, which are involved in resistance to penicillin in Staphylococcus aureus and Escherichia coli. These genes show reduced expression when treated with chitosan-metal ion nanoparticles in combination with antibiotics.

The study identifies several genes and mutations associated with carbapenem resistance in Acinetobacter baumannii, including efflux pump components (AdeB, AdeC, AdeS), penicillin-binding proteins (PBP1a), and outer membrane porins (OprB, OprD, CarO). Mutations in these genes are linked to altered carbapenem susceptibility.

The study identified multiple antibiotic resistance genes in three donkey-derived Streptococcus equi subsp. equi isolates, including genes conferring resistance to beta-lactams, tetracyclines, macrolides, fluoroquinolones, and others. Notably, the HT1112 isolate showed resistance to six antimicrobials, while HTP133 and HTP232 showed resistance to fewer drugs. Additionally, the study highlighted the role of biofilm formation in antimicrobial resistance.

The study identifies several antibiotic resistance genes in the large inversion fragment of S.iniae BH16-24, contributing to its multidrug resistance. These genes include pbp2B, pbp1A, pbp2X, femA, gyrA, oppA, aph, dfrA, and macB, which confer resistance to beta-lactams, fluoroquinolones, aminoglycosides, trimethoprim, and macrolides.

The study identified mutations in the pbp1A gene, specifically A480V and G591K, which are associated with amoxicillin resistance in Helicobacter pylori isolates.

Arginine metabolism in Enterococcus faecalis leads to increased aggregation, decreased biofilm formation, and altered antibiotic susceptibility, particularly to ampicillin and ceftriaxone.

The study identified several AMR genes and mutations in H. pylori strains from Hainan Province, China, including 23S rRNA (A2143G) for clarithromycin resistance, gyrA (N87K, D91N) for levofloxacin resistance, rdxA (R16H/C, M21A) for metronidazole resistance, pbp1A (Thr593Ala, Thr556Ser, Asn562Tyr, Phe366Leu, Val374Leu, Ser414Arg) for amoxicillin resistance, 16S rRNA (AGA926_928>GGA, AGA926_928>AGC, AGA926_928>GGC, AGA926_928>TGA) for tetracycline resistance, porD (A356G, C357T, G353A) and oorD (A41G, A122G, A335G, C349A, C349G) for furazolidone resistance.

The study identified several mutations in 23S rRNA, gyrA, pbp1 A, and rdxA genes associated with resistance to clarithromycin, levofloxacin, amoxicillin, and metronidazole in H. pylori isolates from Vietnam.

The study identifies the emergence of a multidrug-resistant Streptococcus pneumoniae serotype 35B-ST156 clone in Japan, characterized by resistance to beta-lactams, macrolides, and co-trimoxazole due to specific genetic mutations and gene acquisitions.

The study identifies the A2143G mutation in the 23SrRNA gene as the primary cause of clarithromycin resistance in H. pylori isolates from West Bengal, India. It also reports multiple mutations in the gyrA gene associated with levofloxacin resistance and specific amino acid changes in pbp1A linked to amoxicillin resistance.

The study identified 10 antibiotic resistance genes in the Actinobacillus pleuropneumoniae strain APPFJLYC01, including genes conferring resistance to multiple antibiotic classes such as β-lactams, tetracyclines, aminoglycosides, and macrolides.

The study identified several AMR genes and mutations in 141 clinical Helicobacter pylori isolates from Eastern China, including 23S rRNA (A2143G), infB (C110T), gyrA (T261A), gyrB (G1033A), pbp1A (1785_1786insAGC), rdxA (G278A), frxA (T184A), recA (G946A), 16S rRNA (A928C), and oorD (G22A) associated with resistance to clarithromycin, levofloxacin, amoxicillin, metronidazole, tetracycline, and furazolidone.

The study demonstrates the acquisition of five high-Mr penicillin-binding protein (PBPs) variants (PBP2x, PBP2a, PBP2b, PBP1a, and PBP1b) during the transfer of high-level beta-lactam resistance from Streptococcus mitis to Streptococcus pneumoniae. These PBPs confer resistance to cefotaxime, oxacillin, and benzylpenicillin.

The study identified multiple penicillin-resistant Streptococcus pneumoniae isolates from Bulgaria, characterizing their resistance mechanisms through molecular techniques. Key findings include the identification of specific penicillin-binding protein genes (pbp1a, pbp2b, pbp2x) and resistance genes (ermB, mefE, tetM, cat) associated with resistance to penicillin, erythromycin, tetracycline, and chloramphenicol.