TekVet says that research has revealed a significant increase in the animal's core temperature 48 hours before physical signs of sickness appear
Scientists are testing a new animal identification system that could help to detect disease in cattle before the onset of physical symptoms. 
Photo: TekVet
The Beef Stocker Unit at Kansas State University (K-State) is trialing an electronic ear tag developed by TekVet Technologies, based in Palmetto, Florida. The tag, TekSensor, is unique because it consists of an electronic thermometer that fits inside the animal's ear canal and measures the animal's temperature every hour.
TekVet says that research has revealed a significant increase in the animal's core temperature 48 hours before physical signs of sickness appear.
Marc Epp, manager of K-State's Beef Stocker Unit, says that even to a trained eye, visual identification is not an exact science.
"In some cases it's just a judgment call based on your experience," he said. "Sometimes the cattle don't feel like eating, they hold their head down. Or they might be having a hard time getting around. You can just tell by paying attention to their mannerisms."
Dr Dale Blasi, an animal sciences and industry professor at K-State, says that there is still a lot to learn about the information that early detection can provide. However, the fact that the device indicates to feedlot managers which animals should be monitored is a benefit because it can be used to prevent sickness in a herd.
"We're evaluating the importance of this technology for early disease detection," he said. "We want to be able to administer any antibiotic based on the true need of the animal."
The technology is particularly useful when new animals are introduced to the herd after spending many hours in transport, a situation that often creates increased stress and susceptibility to sickness, Dr Blasi adds.
Early findings on the first set of calves studied in the research trial have shown differences in the way the animals reacted to certain antibiotics. Research on a second set of calves will continue during 2008.
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