title: Preliminary studies on occurrence of monensin antibiotic in Bosque River Watershed.
abstract: Water quality impact due to excessive nutrients has been extensively studied. In recent years, however, micro-pollutants such as pharmaceuticals and hormonal products used in animal agriculture have added an additional impact to overall water quality. Pharmaceuticals used in the poultry, swine, beef, and dairy industries have been detected in various environmental matrices such as, soil, groundwater and surface water. In this study, 26 surface water samples were collected throughout the Bosque River Watershed (BRW) with samples representing a range of land use conditions and locations of major dairy operations. Samples were analyzed using commercially available Enzyme-Linked Immunosorbent Assay test. Of the 26 samples, three samples consistently tested positive for monensin antibiotic with concentration ranging from 0.30 to 3.41 microg/L. These three samples were collected from sites that received varying amount of agriculture wastes (11.7% to 31.3%) and located downstream from sites associated with moderate levels of animal agriculture. The preliminary results suggest that there is a potential for monensin occurrence in the BRW, although initial findings indicate only very low levels.
authors.affiliation: Environmental Engineering, Department of Engineering and Physics, Box T-0390, Tarleton State University, Stephenville, TX 76402, USA. kurwadkar@tarleton.edu
authors.forename: Sudarshan
authors.initials: S
authors.lastname: Kurwadkar
authors.forename: Victoria
authors.initials: V
authors.lastname: Sicking
authors.forename: Barry
authors.initials: B
authors.lastname: Lambert
authors.forename: Anne
authors.initials: A
authors.lastname: McFarland
authors.forename: Forrest
authors.initials: F
authors.lastname: Mitchell
mesh_terms: D000900:Anti-Bacterial Agents / Q000032:analysis; D004797:Enzyme-Linked Immunosorbent Assay; D060587:Groundwater / Q000032:analysis; D008985:Monensin / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000900:Anti-Bacterial Agents; D014874:Water Pollutants, Chemical; D008985:Monensin