and Streptococcus equi subspecies equi.A questionnaire was included with each submission. Diagnostic testing was performed with real-time qPCR within 24hours of sample arrival. Basic frequency statistics andmultivari- ate logistic regressionmodels were utilized to determine the associations between risk factors andEIVpositivity.


3. Results and Discussion


A total of 966 positive samples for EIV were received from 35 states with a positivity rate of 9.9%.While EIV affected all ages, breeds and was reported throughout all seasons, Quarter Horses ranging between 1-9years of age with a recent travel history during winter and spring seasons weremost commonly infected.


Acknowledgments


A sincere thank you to the participating veterinarians and veterinary clinics who have submitted and continue to submit respiratory samples to this ongoing respiratory surveillance program. The results we have reviewed today reflect your desiretoknowmoreabout equine infectious respiratory disease.


MEDICINE I: DRUGS, DISEASE SURVEILLANCE, AND DISASTERS Funding Source


This ongoing respiratory biosurveillance study is funded byMerck Animal Health.


Declaration of Ethics The Authors have adhered to the Principles of VeterinaryMedical Ethics of the AVMA.


Conflict of Interest


Sample selection and submission to this voluntary pro- gramis determined by the submitting veterinarian. The following co-authors are employed by Merck Animal Health: Drs. Duane Chappell, Bryant Craig, Fairfield Bain, Chrissie Schneider, andWendy Vaala. The follow- ing co-authors were previously employed by Merck Animal Health: Drs. Craig Barnett and Earl Gaughan during thetimeof this study. Dr. Nicola Pusterla and Samantha Mapes are employed by UC Davis School of Veterinary Medicine where the PCR laboratory is located. Dr. Kaitlyn James has served as a paid inde- pendent statistician byMerck AnimalHealth to provide analysis for this project.


AAEP PROCEEDINGS / Vol. 68 / 2022 57


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