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

ABSTRACT:

Background

Severity of lung lesions quantified by thoracic ultrasonography (TUS) at time of bronchopneumonia (BP) diagnosis predicted death among steers not treated for this condition. Further research is needed to confirm that lung lesions detected by TUS can be associated with negative outcomes in cattle with BP that subsequently were treated.

Objective

To quantify the effects on relapse rate and average daily gain (ADG) of lung lesions detected by TUS at first BP diagnosis in feedlot cattle.

Animals

Prospective cohort of mixed beef-breed steers (n = 93; 243 ± 36 kg) and heifers (n = 51; 227 ± 42 kg) with BP at 4 feedlots.

Methods

Thoracic ultrasonography was performed by the same clinician and 16-second TUS videos were evaluated offline for maximal depth and

SUBMITTER: Timsit E 

PROVIDER: S-EPMC6524390 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature