The monthly ovitrap index has fallen from a record high of 31.6% in May to 2.4% in November, the Anti-mosquito Steering Committee says. The area ovitrap indices have improved from five locations exceeding 50%, to none exceeding 10% during the period.

The committee today reviewed the Government's anti-mosquito efforts in 2004 and formulated action plans for the next rainy season. The committee said as of yesterday, there were 29 imported Dengue fever and five Japanese encephalitis cases this year, while the figures for last year were 49 and one.

Concerned about the number of cases, the committee decided to adopt a multi-pronged approach to prevent and enhance control on vectors.

The Food & Environmental Hygiene Department has been conducting a special vector survey since October. The year-long study assesses the distribution of vectors and will provide scientific basis for strategic control.

Government departments will enhance anti-mosquito operations around pig farms and at sites where migratory birds gather, particularly during the rainy season. Where sites with proliferated undergrowth and illegal cultivation are found, departments will cut grass and conduct other follow-up action.

Demerit system

To intensify enforcement, the Agriculture, Fisheries & Conservation Department is devising a demerit point system for pig farms breaching hygiene practices.

Community education will be enhanced on vector prevention and control. Pig farmers and farm workers will be reminded about encephalitis prevention through publicity materials and seminars.

The Government is exploring the possibility of a trial encephalitis vaccination programme for pigs which will be developed in consultation with farmers.

The committee also endorsed more power for the Food & Environmental Hygiene Department to deal with potential mosquito breeding places and to take enforcement action.