Hong Kong confirmed its first case of African swine fever on Friday and ordered the cull of at least 6,000 pigs at a government-owned slaughterhouse.Secretary for Food and Health Sophia Chan Siu-che announced the finding late on Friday and detailed the government’s plans to tackle the swine fever, which is highly infectious to pigs but poses no health risk to humans.Health authorities said the infected pig was imported from Zhanjiang, Guangdong province.Chan Kin-yip, chairman of the Federation…