Source: Dominique Patton, Reuters, 22 January 2021, photo credit: The Native Antigen Company
BEIJING (Reuters) – A new form of African swine fever identified in Chinese pig farms is most likely caused by illicit vaccines, industry insiders say, a fresh blow to the world’s largest pork producer, still recovering from a devastating epidemic of the virus.
Two new strains of African swine fever have infected more than 1,000 sows on several farms owned by New Hope Liuhe, China’s fourth-largest producer, as well as pigs being fattened for the firm by contract farmers, said Yan Zhichun, the company’s chief science officer.
Though the strains, which are missing one or two key genes present in the wild African swine fever virus, don’t kill pigs like the disease that ravaged China’s farms in 2018 and 2019, they cause a chronic condition that reduces the number of healthy piglets born, Yan told Reuters. At New Hope, and many large producers, infected pigs are culled to prevent the spread, making the disease effectively fatal.
Although the known infections are limited now, if the strains spread widely, they could slash pork output in the world’s top consumer and producer; two years ago, swine fever wiped out half of China’s 400 million-head pig herd. Pork prices are still at record levels and China is under pressure to strengthen food security amid the COVID-19 pandemic.
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The South African Pork Producers’ Organisation (SAPPO) coordinates industry interventions and collaboratively manages risks in the value chain to enable the sustainability and profitability of pork producers in South Africa.
