Hog cholera threatens swine herds and costs
The article notes hog cholera as a major killer in the U S swine industry, with annual losses of 20 to 30 million dollars. It recalls past outbreaks in 1895 and the 1920s, cites vaccination as reducing mortality to about 35 per thousand, and argues that universal immunization at weaning plus herd vaccination could drop mortality to about 5 per thousand.
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