Determining associations of bovine respiratory disease intertreatment interval with case fatality risk and factors influencing intertreatment interval

Abstract

Judicious and appropriate antimicrobial therapy is a critical topic in beef cattle production. Bovine respiratory disease (BRD) is the most frequent syndrome requiring antimicrobial therapy in postweaned beef calves; however, little published information has described factors impacting the actual intertreatment interval (ITI) and potential associations of ITI with case outcomes. The objective of this retrospective research is to determine associations between ITI of first and second BRD treatment with antimicrobials with case fatality risk (CFR) and secondarily to identify factors influencing ITI in BRD cases treated at least twice with antimicrobials.