Estimates of on-farm antimicrobial usage in turkey production in the United States, 2013-2017.

With increasing concern about the emergence and spread of resistant bacteria, there is an increasing motivation to optimize antimicrobial use administrations in animal agriculture. A key component of antimicrobial stewardship is the ability to collect antimicrobial use data and ultimately use this information to assess that administrations are necessary and effective. The objective of this study was to develop a system for collecting on-farm antimicrobial use data from the US turkey industry and to have it be representative of the largest commercial turkey producers in the United States that comprise the vast majority of national turkey production. Participation was voluntary. Data were collected for the period 2013 through 2017 and are reported on a calendar year basis. Using statistics from USDA:NASS as a denominator, the data supplied by participating companies represented approximately 67.3% of turkey production in the United States in 2013 and increased to approximately 69.8% in 2017. The data that were submitted for 2017 are based on approximately 187,016,604 poults placed, 164,081,335 turkeys slaughtered, and 5,178,431,422 pounds liveweight produced. The estimated percentage of turkey poults placed that received hatchery antimicrobials decreased from 96% in 2013 to 41% in 2017. Medically important in-feed antimicrobial use decreased substantially. For example, in-feed tetracycline use decreased approximately 67% between 2013 and 2017. Medically important water-soluble antimicrobial use decreased substantially for most antimicrobials. Between 2013 and 2017, water-soluble penicillin use decreased approximately 42%, water-soluble tetracycline use decreased approximately 28%, and water-soluble lincomycin use decreased approximately 46%. Reducing the total amounts of antimicrobials used might be a crude indicator for mitigating the selection of antimicrobial resistance. Reducing the need for such use and verifying that treatment regimens deliver beneficial outcomes to animal health are more meaningful objectives.