Association of lung lesions measured by thoracic ultrasonography at first diagnosis of bronchopneumonia with relapse rate and growth performance in feedlot cattle

Abstract

Severity of lung lesions quantified by thoracic ultrasonography (TUS) at time of bronchopneumonia (BP) diagnosis predicted death among feedlot steers non-treated for this condition. Further research is now needed to confirm that lung lesions detected by TUS can be associated with negative outcomes in cattle with BP that were subsequently treated for this condition. Therefore, the objective was to quantify effects on relapse rate and average daily gain (ADG) of lung lesions detected by TUS at first BP diagnosis in feedlot cattle.