نتایج جستجو برای: florfenicol
تعداد نتایج: 512 فیلتر نتایج به سال:
The florfenicol/chloramphenicol resistance gene floR was found to be part of the novel 4,284-bp transposon TnfloR from Escherichia coli. TnfloR consists of the gene floR, a putative regulatory gene, and the transposase gene tnpA. A circular form of TnfloR was detected and suggested the potential mobility of this transposon.
The objective of this clinical trial was to examine the effect of a single dose of florfenicol on antimicrobial resistance patterns in faecal E. coli of feedlot steers. Steers (n = 370), were purchased from two sources and housed in outdoor concrete floored pens. Two cattle from each pen (n = 42 pens, 84 cattle) were randomly selected for faecal sampling at study day 1, 14, 28, and 42. One samp...
The florfenicol-chloramphenicol exporter gene fexA is part of the novel transposon Tn558 from Staphylococcus lentus. Similarities between Tn558 and Tn554 from Staphylococcus aureus included the arrangement of the transposase genes tnpA to -C and an att554-like target sequence. Circular forms of Tn558 were detected and suggest the functional activity of this transposon.
Of 150 Escherichia coli strains we cultured from specimens taken from cattle in Europe, 3 had elevated MICs against colistin. We assessed all 3 strains for the presence of the plasmid-mediated mcr-1 gene and identified 1 isolate as mcr-1-positive and co-resistant to β-lactam, florfenicol, and fluoroquinolone antimicrobial compounds.
This paper presents a validated protocol, using a novel, specifically formulated medium, to perform broth microdilution antimicrobial susceptibility assays of the salmonid bacterial pathogen Piscirickettsia salmonis. The minimum inhibitory concentrations (MIC) for florfenicol and oxytetracycline against 58 P. salmonis isolates recovered from various outbreaks occurred in Chilean salmonid farms ...
It is generally assumed that antibiotic residues in soils select for antibiotic-resistant bacteria. This assumption was tested by separately adding 10 different antibiotics (≥200 ppm) to three soil-water slurries (silt-loam, sand-loam, and sand; 20% soil [wt/vol]) and incubating mixtures for 24 h at room temperature. The antibiotic activity of the resultant supernatant was assessed by culturing...
Brazil is one of the world’s leading producers Nile tilapia, Oreochromis niloticus. However, industry faces a major challenge in terms infectious diseases, as at least five new pathogens have been formally described last years. Aeromonas species are Gram-negative anaerobic bacteria that often fish causing Motile Septicemia (MAS). In late December 2022, an epidemic outbreak was reported farmed t...
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