Updated at 4.40pm: The Health Department on Wednesday has confirmed this year?s second case of the potentially fatal dengue fever in Hong Kong. A spokesman for the department?s Centre for Health Protection (CHP) said the victim was a 22-year-old man living in Southern District. Dengue fever is a viral illness transmitted by mosquitoes. The man came down with common symptoms of the disease, including fever, muscle pains, chills and headache on December 31, 2005 ? a day after he returned from a visit to Indonesia. He has now recovered after seeking consultation from private doctors. His family members did not show symptoms of the disease, the spokesman said. This is the second case of dengue fever reported in Hong Kong in 2006. Like the previous one, the latest case has been classified as an imported case. Health experts are concerned about the alarming spread of dengue fever in Southeast Asia. Last year 28 Hong Kong people contracted the disease while abroad. In 2005, there were thousands of dengue cases reported in the region. Countries worst-hit included Singapore, which has reported 10,951 cases ? 13 of these were fatal. The CHP spokesman urged people to stay alert about dengue fever and help reduce mosquito breeding. To avoid mosquito bites, he urged people to: Put used cans and bottles into dustbins with covers; Change water for plants once a week and do not leave water in saucers underneath flower pots; Cover water containers, wells and water storage tanks tightly; and Keep all drains free from blockage. The spokesman also advised travellers to: Wear long-sleeved tops and trousers; Use insect repellent on the exposed parts of the body; Use mosquito screens or nets when rooms are not air-conditioned; and Consult a doctor as soon as possible if feeling unwell after returning from their trip.