Not every cow maintains the same core body
temperature, making a defined cutoff for disease diagnosis difficult. A cow whose normal body temperature
rests in the upper percentile of the normal temperature
range, at 39.1°C, may be completely healthy yet be
considered to possess a fever when her temperature is
39.5°C, potentially receiving unnecessary medical treatment. Conversely, some cows maintain RT on the lower
end of the accepted range, at 38.1°C. At 39.0°C these
cows would have a fever, but would be considered normal and may not be treated for a disease that they did
have, potentially resulting in increased treatment costs
later if the producer is using a cutoff point instead of a
baseline measurement. Using individual cow baselines
to monitor RT removes the cow-to-cow variability and
allows producers to manage herd health more efficiently
while addressing each animal’s status and needs individually.
Although not every cow with elevated body temperature will have a health disorder (Kristula et al., 2001;
Wenz et al., 2011), this study indicates that 67% of
them did have an increase in RT 4 d before the clinical
diagnosis of mastitis, hence the importance of continuing this practice on dairy farms. A TSRB, such as the
battery-free one used in this study, can be a useful tool
to aid dairy producers in monitoring their cows for
deviations from the cow’s baseline temperature and in
the early diagnosis of health events. The bolus used in
this study lasts the life of the cow, as it is battery free.
Other TSRB may be powered by a battery, however,
and may only transmit temperature for the life of the
battery. Using a TSRB allows producers to use a relatively noninvasive means of monitoring temperature
while removing external manipulating factors, reducing
Not every cow maintains the same core bodytemperature, making a defined cutoff for disease diagnosis difficult. A cow whose normal body temperaturerests in the upper percentile of the normal temperaturerange, at 39.1°C, may be completely healthy yet beconsidered to possess a fever when her temperature is39.5°C, potentially receiving unnecessary medical treatment. Conversely, some cows maintain RT on the lowerend of the accepted range, at 38.1°C. At 39.0°C thesecows would have a fever, but would be considered normal and may not be treated for a disease that they didhave, potentially resulting in increased treatment costslater if the producer is using a cutoff point instead of abaseline measurement. Using individual cow baselinesto monitor RT removes the cow-to-cow variability andallows producers to manage herd health more efficientlywhile addressing each animal’s status and needs individually.Although not every cow with elevated body temperature will have a health disorder (Kristula et al., 2001;Wenz et al., 2011), this study indicates that 67% ofthem did have an increase in RT 4 d before the clinicaldiagnosis of mastitis, hence the importance of continuing this practice on dairy farms. A TSRB, such as thebattery-free one used in this study, can be a useful toolto aid dairy producers in monitoring their cows fordeviations from the cow’s baseline temperature and inthe early diagnosis of health events. The bolus used inthis study lasts the life of the cow, as it is battery free.Other TSRB may be powered by a battery, however,and may only transmit temperature for the life of thebattery. Using a TSRB allows producers to use a relatively noninvasive means of monitoring temperaturewhile removing external manipulating factors, reducing
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