Significance:

• The rise of antibiotics resistant bacteria among farm animals and consumer meat/fish products is a major food safety concern. 

Objective:

• Identify and quantify five commonly used antibiotics administered to bovine in both soil and water runoff in a feedlot located in the Midwest, US 

Hypothesis:

• Pens without antibiotics administered would have significantly less antibiotics in the soil and water runoff.

Conclusions:

• Antibiotics injected metabolized in the bovine and degraded efficiently on the feedlot surface.

• Antibiotics fed daily over time did not metabolized as efficiently in the bovine or degrade on the feedlot

Funded: USDA-NIFA

Publication:

Trejo, B., Russell, M. V., Bartelt-Hunt, S. L., Naderi Beni. N., Snow, D. D., Messer, T. L. 2023. Occurrence and Persistence of Antibiotics Administered to Cattle in a Newly Established Feedlot. Journal of Environmental Quality. 52(6): 1193-1205. doi: 10.1002/jeq2.20516

Graduate Student: Brittany Trejo (MS Environmental Engineering; Graduated 2020)