Occurrence of tylosin-resistant enterococci in swine manure and tile drainage systems under no-till management
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x CHAPTER 1 GENERAL INTRODUCTION 1 1.
منابع مشابه
Transport and persistence of tylosin-resistant enterococci, genes, and tylosin in soil and drainage water from fields receiving Swine manure.
Land application of manure from tylosin-treated swine introduces tylosin, tylosin-resistant enterococci, and erythromycin resistant rRNA methylase () genes, which confer resistance to tylosin. This study documents the persistence and transport of tylosin-resistant enterococci, genes, and tylosin in tile-drained chisel plow and no-till agricultural fields treated with liquid swine manure in alte...
متن کاملExploring the Relationship between Transport, Resistance, and Virulence Factors of Escherichia coli Collected from Swine Manure
Broad spectrum antibiotics, such as Tylosin (naturally synthesized by Streptomyces fradiae) are used to treat infections in farm animals and are often administered at sub-therapeutic levels along with feed rations. The presence of bacteria resistant to antimicrobials in animal waste has raised concern related to their transport to surface and groundwater. Previous studies have shown that cells ...
متن کاملEffects of liquid swine manure applications on NO3–N leaching losses to subsurface drainage water from loamy soils in Iowa
Long-term applications of organic or inorganic sources of N to croplands can increase the leaching potential of nitrate– nitrogen (NO3–N) for soils underlain by subsurface drainage ‘‘tile’’ network. A field study was conducted for 6 years (1993– 1998) to determine the effects of liquid swine manure and urea ammonium nitrate (UAN) solution fertilizer applications on NO3–N concentrations and NO3–...
متن کاملSimulating management effects on crop production, tile drainage, and water quality using RZWQM–DSSAT
The objective of this study was to explore if more crop-specific plant growth modules can improve simulations of crop yields, and N in tile flow under different management practices compared with a generic plant growth module. We calibrated and evaluated the Root Zone Water Quality Model (RZWQM) with the Decision Support for Agrotechnology Transfer (DSSAT v3.5) plant growth modules (RZWQM–DSSAT...
متن کاملEffects of tylosin use on erythromycin resistance in enterococci isolated from swine.
The effect of tylosin on erythromycin-resistant enterococci was examined on three farms; farm A used tylosin for growth promotion, farm B used tylosin for treatment of disease, and farm C did not use tylosin for either growth promotion or disease treatment. A total of 1,187 enterococci were isolated from gestation, farrowing, suckling, nursery, and finishing swine from the farms. From a subset ...
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تاریخ انتشار 2016