Thoracic Ultrasonography and Bronchoalveolar Lavage Fluid Analysis in Holstein Calves with Subclinical Lung Lesions

Journal of Veterinary Internal Medicine
T L OllivettD Kelton

Abstract

Thoracic ultrasonography (US) and bronchoalveolar lavage fluid (BALF) analysis are antemortem methods used to identify the lung lesions associated with bovine respiratory disease (BRD). Accuracy of US and the cell distributions in BALF have not been characterized in calves with subclinical disease. To evaluate the accuracy of US and BALF and describe BALF characteristics in calves with subclinical lung lesions. Twenty-five Holstein calves, 1-12 weeks old. In this prospective study, calves with low respiratory scores underwent US, BALF and postmortem examination (normal US, n = 5; comet-tails, n = 5; consolidation, n = 15). Bronchoalveolar lavage fluid was collected and analyzed for total and differential cell counts. Lung lesions were assessed by gross and histopathologic examination. Data were analyzed using nonparametric methods and relative risk analysis. The accuracy of US and BALF were estimated relative to postmortem examination. The sensitivity and specificity of US for detecting lung lesions was 94% (95% CI, 69-100%) and 100% (95% CI, 64-100%), respectively. A cut-point of ≥4% BALF neutrophils was associated with the highest BALF sensitivity and specificity, 81% (95% CI, 56-94%) and 75% (95% CI, 36-95%). The presence of...Continue Reading

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Citations

Dec 12, 2018·The Journal of Veterinary Medical Science·Genya ShimboKazuro Miyahara
Jun 11, 2020·Animals : an Open Access Journal From MDPI·Catie CramerTheresa Ollivett
Jun 17, 2019·Journal of Dairy Science·Gabriele U MaierSharif S Aly
Mar 9, 2021·Animal Health Research Reviews·T L Ollivett
May 27, 2020·The Veterinary Clinics of North America. Food Animal Practice·Sébastien Buczinski, Bart Pardon

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Methods Mentioned

BETA
bronchoalveolar
bronchoalveolar lavage
biopsy
blood collection

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