African swine fever outbreak explained

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African swine fever continues to affect pigs in China and other Asian nations even as authorities try to halt the spread of the disease.

African swine fever is typically spread through bites by infectious ticks, contact through infected animals, contact with objects containing the virus, or by ingesting the meat of infected animals, according to the European Food Safety Authority.

The disease is spread by the DNA virus of the Asfarviridae family, according to the World Organization for Animal Health.

African swine fever affects only porcine species. Warthogs are naturally resistant to the virus but can expose wild boars to infection.

Domestic pigs can contract the disease through exposure to infected wild boars, to which the disease is endemic.

Symptoms include high fever, redness on the ears, abdomen, legs as well as diarrhea, as stated by the World Organisation for Animal Health.

There currently is no approved vaccine to prevent the spread of the disease among pigs.

Asian countries such as Mongolia, China, North Korea, Laos and Cambodia have all been hit by the virus.

Vietnam has been hit particularly hard, with 10 percent of its herd — some 2.8 million animals — having been culled.

The disease is fatal for pigs. It, however, isn't transmissible to humans.

RUNDOWN SHOWS:
1. How African swine fever is typically spread
2. A pig and the Asfarviridae virus
3. Which types of swine are resistant to the virus
4. Symptoms of African swine fever
5. There is currently no vaccine
6. East Asian countries currently hit by the virus

VOICEOVER (in English):
"African swine fever is typically spread through bites by infectious ticks, contact through infected animals, contact with objects containing the virus, or by ingesting the meat of infected animals, according to the European Food Safety Authority."

"The disease is spread by the DNA virus of the Asfarviridae family, according to the World Organization for Animal Health."

"African swine fever affects only porcine species. Warthogs are naturally resistant to the virus but can expose wild boars to infection."

"Domestic pigs can contract the disease through exposure to infected wild boars, to which the disease is endemic."

"Symptoms include high fever, redness on the ears, abdomen, legs as well as diarrhea, as stated by the World Organisation for Animal Health."

"There currently is no approved vaccine to prevent the spread of the disease among pigs."

"Asian countries such as Mongolia, China, North Korea, Laos and Cambodia have all been hit by the virus."

"Vietnam has been the hardest hit, with 10 percent of its herd — some 2.8 million animals — having been culled."

SOURCES: Food and Agriculture Organization of the United Nations, Reuters, Channel News Asia, World Organization for Animal Health,
http://www.fao.org/ag/againfo/programmes/en/empres/ASF/situation_update.html
https://graphics.reuters.com/CHINA-SWINEFEVER-FARMERS/010090DR0KM/index.html
https://www.reuters.com/article/us-china-swinefever-production-insight/swine-fever-toll-in-china-may-be-twice-as-high-as-reported-industry-insiders-say-idUSKCN1TV017
https://www.channelnewsasia.com/news/singapore/is-african-swine-fever-contagious-facts-asf-disease-asia-11663544
http://www.oie.int/en/animal-health-in-the-world/animal-diseases/african-swine-fever/