Characterisation of the Antimicrobial Resistance Profile of Culturable Gram-Negative Bacterial Isolates from Green Sea Turtles (Chelonia Mydas) in the Gulf of Thailand

Опубликована: Янв. 1, 2025

Язык: Английский

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Seasonal and environmental drivers of antibiotic resistance and virulence in Escherichia coli from aquaculture and their public health implications

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Май 8, 2025

Abstract Aquaculture is increasingly impacted by environmental stressors such as temperature and pH fluctuations, which influence the proliferation antibiotic resistance of Escherichia coli ( E. ). This study investigates effects these factors on prevalence, virulence, isolated from aquaculture environments in Egypt, with a focus public health implications. A total 328 Oreochromis niloticus (Nile tilapia) samples were collected Egyptian fish farms over five sampling periods, representing different seasonal conditions. was identified using selective culture methods biochemical tests. Molecular characterization conducted via polymerase chain reaction (PCR) to detect diarrheagenic pathotypes st, lt, eaeA, bfpA, stx1, stx2 Additionally, PCR utilized screen for β-lactamase carbapenemase genes. Water parameters, including pH, recorded, their correlation bacterial profiles analyzed. high prevalence (92.68%) observed, significant between occurrence elevated water temperatures. Diarrheagenic detected 82.1% samples, enterotoxigenic (ETEC) being most common pathotype. Some isolates harbored multiple virulence genes, indicating hybrid strains. Resistance genes bla TEM , CTX-M OXA-48 widely distributed, particularly during warmer months at neutral levels. Groups temperatures exhibited higher antibiotic-resistant isolates, often harboring highlights role influencing pathogenicity, systems. The findings emphasize need continuous monitoring improved biosecurity measures mitigate risks associated MDR aquaculture, ensuring food safety protecting health.

Язык: Английский

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Characterization of Antibiotic Resistance in Shewanella Species: An Emerging Pathogen in Clinical and Environmental Settings

Microorganisms, Год журнала: 2025, Номер 13(5), С. 1115 - 1115

Опубликована: Май 13, 2025

Antibiotic resistance is increasing at an alarming rate worldwide, in large part due to their misuse and improper disposal. Antibiotics administered treat human animal diseases, including feed supplements for the treatment or prevention of disease farm animals, have contributed greatly emergence a multitude antibiotic-resistant pathogens. Shewanella one many bacteria that developed antibiotic resistance, some species, multiple-antibiotic (MAR). rod-shaped, Gram-negative, oxidase-positive, H2S-producing bacterium naturally found marine environment. In humans, spp. can cause skin soft tissue infections, septicemia, cellulitis, osteomyelitis, ear wound infections. Some been shown be resistant variety antibiotics, beta-lactams, aminoglycoside, quinolones, third- fourth-generation cephalosporins, carbapenems, presence genes such as blaOXA-class D beta-lactamase-encoding gene, blaAmpC-class-C qnr gene. Bacteria acquire transmit these through different horizontal gene-transmission mechanisms transformation, transduction, conjugation. The are present on chromosomes plasmids. Apart from this, heavy metals arsenic, mercury, cadmium, chromium also increase co-selection processes co-resistance, cross co-regulation mechanisms. drugs enter pores gates cell wall may ejected by efflux pumps, which first line bacterial defense against antibiotics. Multiple-drug particularly difficult control. This review focuses phenotypic genomic characteristics involved antimicrobial this bacterium.

Язык: Английский

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Amino-functionalized cellulose beads supporting laccase: A dual-function catalyst for simultaneous adsorption and enzymatic conversion of tetracycline

International Journal of Biological Macromolecules, Год журнала: 2024, Номер unknown, С. 138641 - 138641

Опубликована: Дек. 1, 2024

Язык: Английский

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