A historically wet winter and, now, hotter summer are leading to 'pretty big' warning signs for West Nile virus in the Western US, public health and mosquito control experts say, suggesting that residents should take care to avoid bites.
and, now, hotter summer are leading to "pretty big" warning signs for West Nile virus in the Western U.S., public health and mosquito control experts say, suggesting that residents should take care to avoid bites.
West Nile virus is the most common cause of mosquito-borne disease in the continental U.S., with thousands of cases reported to the U.S. Centers for Disease Control and Prevention every year, said Dr. Erin Staples, the medical epidemiologist in charge of the agency's arboviral diseases branch. The Davis Mosquito Abatement District announced Monday that a mosquito pool tested positive for West Nile virus last week and recommends people protect themselves from mosquitoes.West Nile, named for the region in Uganda where it was identified in 1937, is typically spread in the U.S. by a mosquito called Culex, found across the country, Staples said.
And while human cases are still relatively low, at 90 across the U.S., August is typically the month that sees the most cases. And those surveillance systems in Western states are starting to produce "pretty big" warning signs for a potentially more active West Nile season, Markowski said. She noted, though, that elevated surveillance signals don't automatically translate into higher human cases, as the transmission chain, involving mosquitoes and birds, is complicated.
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