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A beef herd presented four calves, aged 8–9 months, in late September for evaluation of respiratory disease of 2 months duration that was non-responsive to antimicrobial treatment. Calves were housed on a marshy pasture and similar signs occurred in calves during the same months the previous 2 years. The owner reported greater than 50% of calves were affected with a significantly decreased rate of gain. Physical examination revealed tachypnea and cough. Transtracheal wash cytology, viral respiratory PCR panel and bacterial culture were performed. The viral respiratory PCR panel was negative, and bacterial cultures identified commensal bacteria.
Direct and cytospin cytology from a transtracheal wash contained increased cellularity and mucus with erythrocytes. There were ciliated epithelial cells and a mixture of inflammatory cells, including macrophages (51%), …
Contributors JS, JO and MH worked up the case in the clinic. CA and MB evaluated the cytology. All authors contributed to manuscript construction.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Data availability statement All data relevent to the case report are included in the article.
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