The Centre for Health Protection yesterday confirmed that a 59-year-old Sheung Shui man has been infected with Streptococcus suis, a bacteria caught from pigs - the second case this year. The man developed fever, chills and muscle pain on May 19 and was admitted to North District Hospital the same day. He is now in a stable condition. A centre spokesman said the patient had not travelled recently but he had been to a market and had wounds on his arms. The centre is still investigating. Last Tuesday, the centre confirmed the first case of the infection this year, in which a 79-year-old woman living in Chai Wan was treated in hospital.