Hong Kong has recorded its second meningococcal infection this year, the government announced yesterday. The 29-year-old infected woman lives in Yau Ma Tei and was being treated at the Kwong Wah Hospital. Her condition was stable, a health department spokesman said. Severe illness or even death may occur when the bacteria that cause the infection invade the bloodstream or the brain. But early cases could be treated effectively with antibiotics, the spokesman said. The women developed symptoms, including fever, chills, headaches, vomiting and malaise, last Wednesday and was admitted to hospital on Saturday. Her case has been listed by the department as locally contracted. A relative living with the woman is under medical surveillance but has not shown symptoms. A bacteria called meningococcus causes the meningococcal infection which is transmitted by direct contact. There were four meningococcal infections last year. The department's Centre for Health Protection also yesterday confirmed the year's first case of legionnaires' disease. The patient is a 38-year-old man who lives on the mainland but travels to Hong Kong for work daily. He was admitted to the North District Hospital on March 21 after showing symptoms, including fever, coughing and nocturnal sweating, since February. His condition is stable. The government is still trying to establish whether the man contracted the disease in Hong Kong or the mainland. The city had three cases of legionnaires' disease last year.