Bovine respiratory disease complex remains one of the most economically important diseases of stocker cattle. Reports of myocardial
injury associated with BRDC have been limited to necropsy findings. An animal-side diagnostic test for cardiac troponin I (cTnI)
has been validated for use in cattle. The objective of this study was to determine the association of blood concentration of cTnI and
pneumonia in stocker cattle. A proof-of-concept study was conducted using 16 calves (7 healthy; 9 BRDC).