希尔斯伯勒县10月28日起直升机白天空中灭蚊，阻断登革热传播链
佛罗里达州希尔斯伯勒县坦帕市及周边社区10月28日至30日白天将出现低空飞行的灭蚊直升机。县府10月27日宣布，为阻止登革热传播，县里将在本周白天出动直升机，对卡罗尔伍德至坦普尔特雷斯至棕榈河一带的社区进行空中蚊虫幼虫处理。直升机将向积水处喷洒液态苏云金芽孢杆菌以色列亚种，这是一种天然存在的细菌，可打断蚊虫的繁殖周期，尤其针对传播登革热病毒的蚊虫。
县府强调，该产品对人、宠物、鱼类、鸟类与有益昆虫无害，会在环境中自然降解。坦帕中部处理区的范围大致为：北至福勒大道，南至275号州际公路与4号州际公路，东至北50街，西至戴尔马布里公路；棕榈河处理区北至塞尔蒙高速公路，南至阿拉菲亚河，东至301号美国国道，西至希尔斯伯勒湾。处理期间居民可能看到直升机在住宅区上空低空直线反复飞行，县府请居民不必惊慌。
Hillsborough County to Conduct Daytime Aerial Mosquito Treatment by Helicopter Starting Oct. 28 to Break Dengue Transmission
Tampa, Hillsborough County, Florida — Residents of Tampa and surrounding communities will see low-flying mosquito-control helicopters during the daytime from Oct. 28 to 30. The county announced on Oct. 27 that, to stop the spread of dengue fever, helicopters will conduct aerial larvicide treatments during the week over neighborhoods from Carrollwood through Temple Terrace to Palm River.
The helicopters will spray liquid Bti — Bacillus thuringiensis israelensis, a naturally occurring bacterium — over standing water. The treatment disrupts the mosquito breeding cycle and is especially targeted at the mosquitoes that transmit the dengue virus. The county emphasized that the product is harmless to people, pets, fish, birds and beneficial insects, and breaks down naturally in the environment.
The central Tampa treatment area is roughly bounded by Fowler Avenue to the north, Interstate 275 and Interstate 4 to the south, North 50th Street to the east and Dale Mabry Highway to the west. The Palm River treatment area runs from the Selmon Expressway in the north to the Alafia River in the south, and from U.S. Route 301 in the east to Hillsborough Bay in the west. Residents may see helicopters flying low in repeated straight lines over neighborhoods during the treatments and should not be alarmed, the county said.
来源：GSM·美国（原文链接）
图片来源：图：埃及伊蚊正在人皮肤上吸血（资料图）。美国疾病控制与预防中心公共卫生图片库，James Gathany 摄，公共领域。 / Photo: An Aedes aegypti mosquito feeding on human skin, file photo. U.S. Centers for Disease Control and Prevention, Public Health Image Library; by James Gathany; public domain.
