{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T03:47:50Z","timestamp":1792640870940,"version":"4.5.0"},"reference-count":61,"publisher":"American Chemical Society (ACS)","issue":"4","license":[{"start":{"date-parts":[[2017,12,29]],"date-time":"2017-12-29T00:00:00Z","timestamp":1514505600000},"content-version":"vor","delay-in-days":1072,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2015,4,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Emergence and spread of antibiotic resistance has become a global health threat and is often linked with overuse and misuse of clinical and veterinary chemotherapeutic agents. Modern industrial-scale animal feeding operations rely extensively on veterinary pharmaceuticals, including antibiotics, to augment animal growth. Following excretion, antibiotics are transported through the environment via runoff, leaching, and land application of manure; however, airborne transport from feed yards has not been characterized.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objectives:<\/jats:title>\n                    <jats:p>The goal of this study was to determine the extent to which antibiotics, antibiotic resistance genes (ARG), and ruminant-associated microbes are aerially dispersed via particulate matter (PM) derived from large-scale beef cattle feed yards.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>PM was collected downwind and upwind of 10 beef cattle feed yards. After extraction from PM, five veterinary antibiotics were quantified via high-performance liquid chromatography with tandem mass spectrometry, ARG were quantified via targeted quantitative polymerase chain reaction, and microbial community diversity was analyzed via 16S rRNA amplification and sequencing.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>Airborne PM derived from feed yards facilitated dispersal of several veterinary antibiotics, as well as microbial communities containing ARG. Concentrations of several antibiotics in airborne PM immediately downwind of feed yards ranged from 0.5 to 4.6 \u03bcg\/g of PM. Microbial communities of PM collected downwind of feed yards were enriched with ruminant-associated taxa and were distinct when compared to upwind PM assemblages. Furthermore, genes encoding resistance to tetracycline antibiotics were significantly more abundant in PM collected downwind of feed yards as compared to upwind.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>Wind-dispersed PM from feed yards harbors antibiotics, bacteria, and ARGs.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Citation:<\/jats:title>\n                    <jats:p>McEachran AD, Blackwell BR, Hanson JD, Wooten KJ, Mayer GD, Cox SB, Smith PN. 2015. Antibiotics, bacteria, and antibiotic resistance genes: aerial transport from cattle feed yards via particulate matter. Environ Health Perspect 123:337\u2013343;\u2002http:\/\/dx.doi.org\/10.1289\/ehp.1408555<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1289\/ehp.1408555","type":"journal-article","created":{"date-parts":[[2015,1,22]],"date-time":"2015-01-22T09:12:27Z","timestamp":1421917947000},"page":"337-343","source":"Crossref","is-referenced-by-count":350,"title":["Antibiotics, Bacteria, and Antibiotic Resistance Genes: Aerial Transport from Cattle Feed Yards via Particulate Matter"],"prefix":"10.1021","volume":"123","author":[{"given":"Andrew D.","family":"McEachran","sequence":"first","affiliation":[{"name":"Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brett R.","family":"Blackwell","sequence":"additional","affiliation":[{"name":"Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. Delton","family":"Hanson","sequence":"additional","affiliation":[{"name":"Research and Testing Laboratory, Lubbock, Texas, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kimberly J.","family":"Wooten","sequence":"additional","affiliation":[{"name":"Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gregory D.","family":"Mayer","sequence":"additional","affiliation":[{"name":"Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen B.","family":"Cox","sequence":"additional","affiliation":[{"name":"Research and Testing Laboratory, Lubbock, Texas, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philip N.","family":"Smith","sequence":"additional","affiliation":[{"name":"Department of Environmental Toxicology, Texas Tech University, Lubbock, Texas, 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