African swine fever

noun

: a highly contagious usually fatal disease of swine that is endemic to sub-Saharan Africa, that resembles but is more severe than hog cholera, that has spread to and caused epidemics in the western hemisphere, and that is caused by a double-stranded DNA virus (Asfivirus haemorrhagiae of the family Asfarviridae)

called also swine fever

Word History

First Known Use

1935, in the meaning defined above

Time Traveler
The first known use of African swine fever was in 1935

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Cite this Entry

“African swine fever.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/African%20swine%20fever. Accessed 6 Nov. 2025.

Medical Definition

African swine fever

noun
: an acute highly contagious usually fatal febrile disease that affects only swine (family Suidae), that resembles but is more severe than hog cholera, that is indigenous to Africa where wild swine (such as the warthog and bushpig) act as natural reservoirs, that has spread to and caused epidemics in the western hemisphere, and that is caused by a double-stranded DNA virus (Asfivirus haemorrhagiae of the family Asfarviridae) having a capsid with icosahedral symmetry

called also swine fever

Last Updated: - Definition revised
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