Pigs, Animal husbandry, Pneumonia in swine, Swine diseases.
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Coughing is so common among pigs that it seems almost to be regarded as a normal condition. Some pig-raisers will tell you that it is caused by worms, or that their pigs have been eating dry feed or running in dusty yards, but there are many who do not realise that it is a symptom of a highly infectious disease that is making heavy inroads into their profits.
Toop, C. R.
"Infectious pneumonia of pigs,"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 7
, Article 4.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture3/vol7/iss6/4