For this project, Dr. Grohn will coordinate model development and facilitate communication among team members for the assimilation and discussion of data on a regular basis. He will directly supervise the postdoctoral Associate and will coordinate his/her activities. Dr. Grohn will also be responsible for presentation of the findings, including writing progress reports, manuscripts and abstracts for presentation at national meetings. As stated in the proposal the responsibility of the Cornell team is to develop a mathematical model to support decision making on dairy farms regarding the probability that gut flora have reached equilibrium (pretreatment) levels so as to keep the ‘release assessment’ of a QRA at or near zero after antimicrobial treatment or environmental contamination. The model allows us to compare different intervention strategies and their impact on antibiotic resistance control in beef and dairy cattle systems. Dr. Grohn will also provide his expertise at the stakeholder workshops.