Can tropical systems influence the spread of the Zika virus?
By By Katy Galimberti, AccuWeather.com Staff Writer
October 06, 2016, 6:55:56 AM EDT
Experts say that hurricanes and tropical storms could influence the spread of the Zika virus.
With Hurricane Matthew churning toward the U.S. East Coast, questions are rising if tropical activity could lead to a wider spread of the Aedes aegypti mosquitoes.
Jason Rasgon, associate professor of entomology and disease epidemiology at Penn State University, told AccuWeather that there are multiple methods in which hurricanes and tropical storms can spread mosquitoes, including those carrying Zika.
Mosquitoes can be picked up and blown to a new area as the storm advances, he said. Mosquitoes are light and are mostly unaffected by raindrops.
If winds are too strong for the mosquitoes, they will "hunker down," Rasgon said, and avoid being entangled in a storm.
Though some mosquitoes could be transported, it is unlikely weather systems will be a major method of spreading Zika-carrying mosquitoes, Michael Bentley, staff entomologist for the National Pest Management Association told AccuWeather.
"The number of mosquitoes that would survive being transported by a powerful weather system would be very, very low," he said. "The likelihood that any of those surviving mosquitoes would be infected with Zika would be even lower and extremely doubtful."
The Centers for Disease Control and Prevention (CDC) echoed the low risk associated with natural disasters and the increased spread of mosquito-borne viruses.
"Hurricanes in the continental United States have rarely been accompanied by outbreaks of viruses spread by mosquitoes. Flooding immediately washed away existing mosquito larvae populations," Dr. Ben Beard, a CDC official, said.
The more serious threat is the potential impact to mosquito control efforts, Rasgon said. During a storm, insecticide spraying would be put on halt. Rain can also wash away any previously sprayed insecticides.
A storm will often leave standing water behind as well, which creates a breeding ground for mosquitoes.
It doesn't take very long for mosquitoes to breed, Rasgon said, so it wouldn't take very long after a storm for the insects to take over the area, nulling previous control efforts.
"Mosquito populations can rebound fairly quickly," Rasgon said.
But with little data on the subject, the direct impact of tropical systems on Zika is still unclear. More research on the subject is necessary, Rasgon said. It will depend on the size and strength of individual storms as well.
"There are other aspects to consider in the event of a hurricane including increased outdoor exposure and crowding that may increase the risk of infection," Patrick Wedlock, an infectious disease outbreak analyst at Ascel Bio, said.
Wedlock stressed that people should be vigilant about dumping any standing water and to continue to ward off mosquitoes by using repellants and wearing appropriate clothing.
Comments that don't add to the conversation may be automatically or manually removed by Facebook or AccuWeather. Profanity, personal attacks, and spam will not be tolerated.
More Weather News
Weather News - January 21, 2019, 3:11:18 PM EST
As a potent storm slides across the interior West, shifting winds will create difficult travel for some motorists across Southern California and the southwestern United States in general into the middle of this week.
Weather News - January 21, 2019, 11:33:17 AM EST
Parts of western Europe, including much of the Netherlands, Belgium and France, will look like a winter wonderland beginning on Tuesday.
Weather News - January 21, 2019, 3:19:58 PM EST
Following a quick blast of Arctic air, a slow-moving storm will drench the southern United States and raise the risk of localized flooding spanning Tuesday to Thursday of this week.
Weather News - January 21, 2019, 9:34:56 AM EST
Flu season is in full swing, and according to this week’s FluView report, seasonal influenza activity remains elevated in the United States as the flu is widespread in most of the country.
Weather News - January 21, 2019, 10:41:39 AM EST
A total lunar eclipse glowed red in the night sky on Sunday night, the last of its kind anywhere in the world until 2021.
Weather News - January 21, 2019, 2:41:17 PM EST
A dangerous winter storm moved across the Midwest and Northeast this past weekend, blanketing areas of the region with snow and bringing some of the lowest temperatures of the season.
After the storm: Dangerous stretch of subzero AccuWeather RealFeel® Temperatures to grip northeastern US
Weather News - January 21, 2019, 10:12:17 AM EST
A polar plunge of brutal cold has descended on the northeastern United States, which can threaten lives and complicate travel and cleanup efforts following the weekend snowstorm.
Weather News - January 21, 2019, 3:02:11 PM EST
A quick-hitting shot of snow to start the new week across the Rockies will be enough to cause travel issues but a fresh base for the ski resorts.