It's just that in Taiwan the most serious communicable diseases--from malaria and Japanese encephalitis in the early years to the current dengue fever--have been spread by mosquitoes. So the team members are more familiar with these insects.
不過台灣歷來較嚴重的傳染病，譬如早年的瘧疾、日本腦炎，和這次的登革熱，都是蚊子惹的禍，所以他們對蚊子更多一份熟稔拿手。