Limited efficacy of Fever Tag® temperature sensing ear tags in calves with naturally occurring bovine respiratory disease or induced bovine viral diarrhea virus infection.

McCorkell, R.B., Wynne-Edwards, K.E., Windeyer, C., Schaefer, A.L., and others (2014). "Limited efficacy of Fever Tag® temperature sensing ear tags in calves with naturally occurring bovine respiratory disease or induced bovine viral diarrhea virus infection.", Canadian Veterinary Journal, 55(7), pp. 688-690.

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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