Health officials fear an outbreak after a 26-year-old Yuen Long man is infected Hong Kong has confirmed its first locally acquired dengue fever case this year, sparking widespread fears of a new outbreak. A 26-year-old man developed dengue symptoms - including fever, muscle pain, headaches and skin rashes - on September 27, after receiving mosquito bites at his home in Yuen Kong village, Yuen Long. The man works at Kwai Chung Container Terminal No6. The patient visited a doctor on September 30 and was admitted to Yan Chai Hospital last Thursday. His blood was tested and he was discharged on Friday. The results came back Monday afternoon and indicated dengue fever, according to Thomas Tsang Ho-fai, a consultant at the Disease Prevention and Control Division of the Health Department. The patient is reported to be recovering at home. Dr Tsang did not rule out the risk of a new dengue fever outbreak in Hong Kong if more local cases are found. Neither did he rule out the possibility that the disease had already became endemic, or naturally prevalent, in Hong Kong. 'At this moment, we need to do more investigations to find out where he contracted dengue fever. Based on our case finding, we have not identified more people with dengue fever. But we need to look harder to determine if there are some infections which have not been identified,' he said. Dr Tsang said there was a risk of an outbreak in other parts of Hong Kong, not just in Kwai Chung. It may be a single case, he said, but the medical community needed to be alert to all possibilities. Michael Nathan, a scientist at the World Health Organisation, expressed his concern over the first locally acquired case. 'This is a transmission season for that part of the world. Of course, this is our concern,' he said. 'It is difficult to say whether dengue fever has become endemic in Hong Kong. Our concern is with international travel. It is easy for the virus to move from country to country.' Dr Tsang said health officers had visited the patient's wife and son, who had not developed any symptoms. They also interviewed people at the patient's village and workplace, but did not find anyone suffering from symptoms. The Department of Health has recorded 41 imported cases of dengue fever so far this year.