Hong Kong officials plan to cull thousands of poultry after recent fecal samples confirmed the presence of the H7-N9 avian influenza strain at the city’s only poultry market. The Shanghai Daily says 4,500 birds at the market will be culled, and the government plans to take samples from 30 other chicken farms. Live poultry trade had already been suspended over the weekend after secondary tests confirmed the findings. The source of the virus or it’s pathogenic status aren’t clear. No human infections have been reported so far.