McCorkell R, Wynne-Edwards K, Windeyer C, Schaefer A. Limited efficacy of Fever Tag(®) temperature sensing ear tags in calves with naturally occurring bovine respiratory disease or induced bovine viral diarrhea virus infection.
Can Vet J 2014;
55:688-690. [PMID:
24982523 PMCID:
PMC4060915]
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Abstract
Temperature sensing ear tags were tested in 1) auction-derived calves with 50% incidence of bovine respiratory disease, and 2) specific pathogen-free calves infected with bovine virus diarrhea virus. There were no false positives, but tag placement, probe displacement, and a high threshold for activation all contributed to failure to reliably detect sick calves.
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