African swine fever
ASF is transmitted readily by direct or indirect contact. The virus may enter a herd through contaminated feed, water, equipment, clothing, or by contact with an infected animal. Feeding swine pork scraps is forbidden in some areas to prevent transmission. It also may be transmitted by some species of soft ticks, which may transmit the disease to domestic swine from wild boars and feral swine as well as from warthogs, bush pigs, and other species that can carry the disease. Outbreaks of ASF have never occurred in the United States, and it is currently eradicated in the Western Hemisphere. An outbreak that began in NE China in 2018 and continued into 2019, spreading to other E and SE Asian countries, became the most devastating animal disease outbreak known, with significant economic consequences.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
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