Measuring the occurrence of antibiotics in surface water adjacent to cattle grazing areas using passive samplers

Beni, Nasrin Naderi; Snow, Daniel D.; Berry, Elaine D.; Mittelstet, Aaron R.; Messer, Tiffany L.; Bartelt–Hunt, Shannon L.

doi:10.1016/j.scitotenv.2020.138296

Cited by 16 publications

(4 citation statements)

References 48 publications

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“…In surface water in Nebraska, Naderi Beni et al ( 2020 ) detected only one VA (MON), prescribed to confined and grazing livestock at an adjacent farm. Other prescribed VAs (CTC, TYL, SMZ) were undetectable, while non-prescribed VAs (LIN, ERY) were detected.…”

Section: Resultsmentioning

confidence: 99%

Veterinary antimicrobials in cattle feedlot environs and irrigation conveyances in a high-intensity agroecosystem in southern Alberta, Canada

Sura

Larney

Charest

et al. 2022

Environ Sci Pollut Res

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The South Saskatchewan River Basin (SSRB) is considered one of the most intensively farmed regions in Canada, with high densities of livestock and expansive areas of irrigated cropland. We measured concentrations of seven veterinary antimicrobials (VAs) in 114 surface water samples from feedlot environs and 219 samples from irrigation conveyances in the SSRB. Overall, detection frequencies in feedlot environs were 100% for chlortetracycline (CTC) and tetracycline (TC), 94% for monensin (MON), 84% for tylosin (TYL), 72% for lincomycin (LIN), 66% for erythromycin (ERY), and 23% for sulfamethazine (SMZ). For irrigation conveyances, detection frequencies for CTC and TC remained high (94–100%), but dropped to 18% for ERY, 15% for TYL, 10% for MON, and 4% for SMZ. Lincomycin was not detected in irrigation conveyance water. Maximum concentrations of VAs ranged from 1384 µg L−1 (TC) to 17 ng L−1 (SMZ) in feedlot environs while those in irrigation conveyances were 155 ng L−1 (TC) to 29 ng L−1 (ERY). High detection frequencies and median concentrations of VAs in both feedlot environs and irrigation conveyances were associated with high amounts of precipitation. However, an irrigation district (ID) with high livestock density (Lethbridge Northern) did not exhibit higher concentrations of VAs compared to IDs with less livestock, while levels of VAs in irrigation conveyances were less influenced by the degree of surface runoff. The ubiquity of CTC and TC in our study is likely a reflection of its widespread use in intensive livestock operations. Additional investigation is required to link environmental concentrations of VAs with livestock densities and increase our understanding of potential antimicrobial resistance in high-intensity agroecosystems.

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Section: Resultsmentioning

confidence: 99%

Veterinary antimicrobials in cattle feedlot environs and irrigation conveyances in a high-intensity agroecosystem in southern Alberta, Canada

Sura

Larney

Charest

et al. 2022

Environ Sci Pollut Res

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“…Ionophores are a class of compounds regarded as feed additive, Category IV (antimicrobial agents of low importance not used in human medicine) in Canada [ 30 ], and non-MIA [ 5 ], that exhibit both antimicrobial and anticoccidial activity. A recent study showed that monensin could be concentrated in surface water adjacent to cattle grazing areas [ 31 ]. Cross-resistance between different ionophores was reported [ 32 ], but cross-resistance between ionophores and other classes of antimicrobials were infrequently identified.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Quantification Methods to Estimate Farm-Level Usage of Antimicrobials in Medicated Feed in Dairy Farms from Québec, Canada

et al. 2021

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Monitoring antimicrobial usage (AMU) in dairy cattle is becoming common in a growing number of countries, with the ultimate goal to improve practices, reduce the development of antimicrobial resistance, and protect human health. However, antimicrobials delivered as feed additives can be missed by some of the quantification methods usually implemented. Our objective was to compare three methods of quantification of in-feed AMU in Québec dairy herds. We recruited 101 dairy producers for one year in the Québec province. Quantities of antimicrobials were calculated by farm from: (1) feed mills invoices (reference method); (2) veterinary prescriptions; and (3) information collected during an in-person interview of each producer. We standardized AMU rates in kilograms per 100 cow-years and compared the reference method to both alternative methods using concordance correlation coefficients and Bland–Altman plots. Antimicrobial usage was well estimated by veterinary prescriptions (concordance correlation coefficient (CCC) = 0.66) or by the approximation using producer’s data (CCC = 0.73) when compared with actual deliveries by feed mills. Users of medically important antimicrobials for human medicine (less than 10% of the farms) were easily identified using veterinary prescriptions. Given that veterinary prescriptions were mostly electronic (90%), this method could be integrated as part of a monitoring system in Québec.

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“…The presence of AMR contamination puts large populations at health risks as groundwater remains the major source of drinking water worldwide (Zainab et al ., 2020). Surface waters in the vicinity of livestock farms were found to contain antibiotics like sulfadimethoxine, sulfamethoxazole, trimethoprim, sulfamerazine, sulfadiazine, lincomycin, erythromycin and monensin (Beni et al ., 2020). Besides the latter, none of the detected antibiotics was prescribed to livestock at the farm which indicates long‐term persistence of antibiotics in the environment or the need for identification of new nonpoint sources of AMR.…”

Section: Soils In a One Health Perspectivementioning

confidence: 99%

From gut to mud: dissemination of antimicrobial resistance between animal and agricultural niches

Jadeja

Worrich

2022

Environmental Microbiology

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With increasing reports on antimicrobial resistance (AMR) in humans, animals and the environment, we are at risk of returning to a pre-antibiotic era. Therefore, AMR is recognized as one of the major global health threats of this century. Antibiotics are used extensively in farming systems to treat and prevent infections in food animals or to increase their growth. Besides the risk of a transfer of AMR between the human and the animal sector, there is another yet largely overlooked sector in the One Health triad. Human-dominated ecosystems such as agricultural soils are a major sink for antibiotics and AMR originating from livestock farming. This review summarizes current knowledge on the prevalence of AMR at the interface of animal and agricultural production and discusses the potential implications for human health. Soil resistomes are augmented by the application of manure from treated livestock. Subsequent transfer of AMR into plant microbiomes may likely play a critical role in human exposure to antibiotic resistance in the environment. Based on the knowledge that is currently available we advocate that more attention should be paid to the role of environmental resistomes in the AMR crisis.

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Measuring the occurrence of antibiotics in surface water adjacent to cattle grazing areas using passive samplers

Cited by 16 publications

References 48 publications

Veterinary antimicrobials in cattle feedlot environs and irrigation conveyances in a high-intensity agroecosystem in southern Alberta, Canada

Veterinary antimicrobials in cattle feedlot environs and irrigation conveyances in a high-intensity agroecosystem in southern Alberta, Canada

Comparison of Quantification Methods to Estimate Farm-Level Usage of Antimicrobials in Medicated Feed in Dairy Farms from Québec, Canada

From gut to mud: dissemination of antimicrobial resistance between animal and agricultural niches

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