نتایج جستجو برای: tetracycline resistance
تعداد نتایج: 381546 فیلتر نتایج به سال:
There is a growing concern that antibiotic usage in animal production has selected for resistant food-borne bacteria. Since tetracyclines are common therapeutic antibiotics used in poultry production, we sought to evaluate the effects of oral administration on the resistance of poultry commensal bacteria and the intestinal bacterial community structure. The diversity indices calculated from ter...
A recombinant plasmid isolated from a Mycobacterium fortuitum genomic library by selection for gentamicin and 2-N'-ethylnetilmicin resistance conferred low-level aminoglycoside and tetracycline resistance when introduced into M. smegmatis. Further characterization of this plasmid allowed the identification of the M. fortuitum tap gene. A homologous gene in the M. tuberculosis H37Rv genome has b...
It has been proposed that livestock production effluents such as wastewater, airborne dust and manure increase the density of antimicrobial resistant bacteria and genes in the environment. The public health risk posed by this proposed outcome has been difficult to quantify using traditional microbiological approaches. We utilized shotgun metagenomics to provide a first description of the resist...
pMV120 was reported to carry the tetracycline resistance (Tcr) determinant of class N. We obtained tetracycline-susceptible transconjugants harboring plasmids with restriction enzyme profiles indistinguishable from those of pMV120 isolated from tetracycline-resistant clones. We conclude that pMV120 is a cryptic plasmid and that class N of Tcr determinants does not exist.
In Japan, the emergence of macrolide- and oxytetracycline-resistant strains of Nocardia seriolae has previously been reported. Here, we describe the draft genome sequence of N. seriolae strain U-1, isolated in 2011 from a diseased yellowtail in Kagoshima Prefecture. The draft genome does not have any genes responsible for macrolide and tetracycline resistance.
The aim of this study was to determine the frequency of resistance to amoxycillin, tetracycline, metronidazole and clarithromycin in 282 Helicobacter pylori clinical isolates from Spain and to evaluate the evolution of resistance over the five years of this study. The overall percentage of resistance was 19.9% for metronidazole and 3.5% for clarithromycin. Resistance to metronidazole rose from ...
We have been examining the consequences of alternative modes of regulation of plasmid-borne, Tn10-encoded tetracycline resistance for the fitness of Escherichia coli. In a tetracycline-free environment, we measured the effects on fitness that were caused by (1) maximally induced expression of the resistance operon, (2) low-level constitutive expression of the resistance protein, (3) residual ex...
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