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Thermal microchips for non-invasive body temperature monitoring in dairy donkeys
Alexandra Nicoleta Mureșan1, Joana Innocenti2, Ilinca Maria Țăpuc1
1Department of Internal Medicine, Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 400372, Cluj-Napoca, Romania.
Abstract:
This preliminary study aimed to evaluate the feasibility of thermal microchips as a non-invasive alternative for body temperature monitoring in dairy donkeys. Temperature was recorded in 11 jennies using thermal microchips implanted subcutaneously at the neck and read transcutaneous with an RFID scanner, a digital rectal thermometer, and an infrared thermographic camera directed at the neck over the microchip implantation site. Mean temperatures were 35.5 ± 0.82°C (microchip), 36.5 ± 0.59°C (rectal), and 36.0 ± 1.9°C (thermography). Bland-Altman analysis revealed that microchip readings were systematically lower than rectal temperatures by a mean of 1.01°C (95% LoA: -2.68 to 0.64°C), exceeding the clinically acceptable limit of 0.5°C (p = 0.03). Differences between microchip and thermography (bias: -0.49°C; 95% LoA: -5.20 to 4.22°C) and between rectal and thermography readings (bias: 0.52°C; 95% LoA: -3.35 to 4.41°C) were not statistically significant but exceeded acceptable agreement limits. The three methods are not interchangeable.
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