A Chinese vendor prepares pork at a market in Shanghai August 23, 2005. China's far south is on high alert since one person was killed and three infected by a pig-borne disease that had left nearly 40 dead in the southwest, suggesting dangerous meat is being traded across the country. The latest person killed by the disease, caused by the Streptococcus suis bacterium, had handled infected pork, Xinhua news agency said on Tuesday, and the three other victims, all butchers, also likely had contact with tainted meat. REUTERS/Aly Song CC/DY