The bacteria can be passed to the next generation through eggs, so they spread through the mosquito population.

这种细菌可以通过卵传给下一代，因此能够在蚊子种群中传播。

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Active monitoring and surveillance of the natural mosquito population should accompany control efforts to determine programme effectiveness.

积极监测蚊子自然数量应是控制工作的一部分，以了解活动的有效性。

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The most important factor influencing mosquito population is the lowest temperature, and then the highest temperature, month temperature change and precipitation days.

影响蚊虫种群密度的最重要的因子是最低温度，然后依次是最高温度、月温度变化和雨天数。

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Factors behind this year's outbreak include a higher mosquito population and "fitter viruses with higher epidemic potential, " Dr. Ng said.

WSJ: Dengue Fever on the Rise in Singapore

Since then, authorities have stepped up efforts to track the disease and contain the mosquito population, and have improved public education, Dr. Ng said.

WSJ: Dengue Fever on the Rise in Singapore

Dr Pierre Guillet, of the World Health Organization Global Malaria Programme, said the mosquito population had proved itself very adaptive, and responsive to environmental change.

BBC: The malaria parasite is spread by mosquitoes