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KMID : 0359320150550020075
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Korean Journal of Veterinary Research
2015 Volume.55 No. 2 p.75 ~ p.80
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Korean native calf mortality: the causes of calf death
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Kim Ui-Hyung
Jung Young-Hun
Choe Chang-Yong
Kang Seok-Jin
Chang Sun-Sik
Cho Sang-Rae
Yang Byoung-Chul
Hur Tai-Young
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Abstract
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Calf losses have an economic impact on larger Korean native cattle (KNC) breeding farms due to replacement, productivity, and marketing. However, little research on KNC calf mortality or causes of calf death on large-scale breeding farms has been conducted. Based on medical records and autopsy findings from the Hanwoo experimental station of the National Institute of Animal Science, calf death records from 2002 to 2011 were used to identify the causes of mortality. Mortality rate of KNC calves was 5.7%. Large differences (1.8~12.6%) in yearspecific mortalities were observed. Calf deaths were due to digestive diseases (68.7%), respiratory diseases (20.9%), accidents (6.0%), and other known diseases (2.2%). The main cause of calf death was enteritis followed by pneumonia, rumen indigestion, and intestinal obstruction. The greatest number of calf deaths occurred during the fall followed by summer. These results indicated that enteritis and pneumonia were the main reasons for calf death. However, autopsy findings demonstrated that other factors also caused calf death. This study suggested that seasonal breeding and routine vaccinations are the most important factors for preventing calf death, and improving calf health in high land areas with low temperature.
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KEYWORD
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autopsy, calf, disease, Korean native cattle, mortality
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