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Evaluation of Non-Contact Device to Measure Body Temperature in Sheep
Carla Ibáñez1, María Moreno-Manrique2, Aránzazu Villagrá3
1Department of Animal Production and Public Health, Faculty of Veterinary Medicine and Experimental Sciences, Catholic University of Valencia "San Vicente Mártir", 46001 Valencia, Spain.
Animals : an Open Access Journal From MDPI
|January 11, 2024
Summary
Non-contact infrared thermometers (NCIT) and thermal imaging (IRT) showed low accuracy for measuring sheep body temperature compared to rectal temperature (RT). These devices require further development for practical herd management, especially in warm climates.
Area of Science:
- Animal Science
- Veterinary Medicine
- Agricultural Technology
Background:
- Non-contact devices are increasingly used for livestock disease detection via body temperature measurement.
- Limited research exists on the accuracy and correlation of non-contact infrared thermometers (NCIT) and infrared thermography (IRT) with rectal temperature (RT) in sheep.
- Understanding these variations is crucial for implementing non-contact temperature monitoring in herd management.
Purpose of the Study:
- To evaluate the accuracy of NCIT and IRT for measuring body temperature in sheep.
- To compare non-contact device measurements with rectal temperature (RT) across six body regions.
- To assess the feasibility of using these non-contact systems for practical sheep herd management.
Main Methods:
- The study involved 72 healthy Manchega ewes at a farm in Massanassa, Spain, during July 2021.
- Rectal temperature (RT) was measured and compared with temperatures obtained from two types of non-contact infrared devices (NCIT and IRT).
- Temperature measurements were taken from six different body regions on each ewe.
Main Results:
- Except for muzzle temperature measured by NCIT, correlations between RT and NCIT/IRT measurements showed low statistical significance.
- Non-contact device measurements exhibited high variability, making them difficult to apply for practical flock management.
- Measurements require cautious interpretation, particularly in warm climates and open pen environments typical of Mediterranean sheep farms.
Conclusions:
- Current non-contact infrared devices have limited accuracy for routine sheep body temperature monitoring compared to rectal measurements.
- Significant improvements in cost, measurement simplicity, and analysis speed are needed for widespread farm adoption of IRT systems.
- Further research is necessary to refine non-contact thermography for effective integration into livestock herd management strategies.
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