- Lake County News reports
- Posted On
Officials: Three Lake County birds test positive for West Nile Virus
LAKEPORT, Calif. – A red-tailed hawk, a bald eagle, and an American Crow from Lake County have tested positive for West Nile Virus, the Lake County Vector Control District reported Friday.
The red-tailed hawk was found alive but sick near Kelseyville on Feb. 6 and taken to a wildlife rehabilitation center where it died on March 12, officials said.
Vector Control said the bald eagle was found dead in the South Cow Mountain OHV Recreation Area on Feb. 24 and the American Crow was found dead in Clearlake Oaks on March 30.
All three birds were submitted to the California Animal Health and Food Safety (CAHFS) Laboratory at Davis for examination and testing. Vector Control said the cause of death was determined to be West Nile Virus.
This is the first West Nile Virus activity detected in Lake County this year, and the earliest in the year that West Nile Virus activity has been detected in Lake County, Vector Control reported.
Officials said it is not clear when the birds contracted West Nile Virus. The suspected source of the birds’ West Nile Virus infections was consuming infected – but possibly asymptomatic – birds or bird carcasses.
In November and December near Salt Lake City, the US Geological Survey National Wildlife Health Center reported that more than 50 bald eagles contracted West Nile Virus from preying on infected grebes.
Since West Nile Virus arrived in the US in 1999, dead raptors have tested positive during the winter months when there is little or no mosquito activity, Vector Control said. In many cases, starvation leaves raptors immunocompromised and susceptible to West Nile Virus and other diseases that they may have acquired earlier.
There is still much to learn about raptors and West Nile Virus, according to the Vector Control report.
“This is a great reminder to drain rainwater from wheelbarrows, planter pots, children’s toys and other places where mosquitoes grow to protect your family from West Nile Virus,” said Jamesina Scott, Ph.D., district manager and research director of the Lake County Vector Control District. “Mosquitoes thrive in warm weather like we’re enjoying now, and finding positive dead birds so early in the year is a warning that we may have another season with a lot of West Nile virus activity,”
Dr. Scott encourages residents to report any dead birds that they find at any time of the year using the “Report a Dead Bird” link in the right-hand column of the district’s Web site, www.lcvcd.org .
After April 21, dead birds also can be reported by calling the West Nile Virus hotline, 877-WNV-BIRD (877-968-2473).
“Knowing where dead birds are being found helps to direct our mosquito surveillance program,” Dr. Scott explained. “Our district gets immediate access to these reports and they help us locate potential hotspots and reduce the chance of people getting bit by infected mosquitoes.”
West Nile Virus has been detected in dead birds or sentinel chickens in four California counties so far this year. No human cases of West Nile Virus have been reported in California in 2014.
The Lake County Vector Control District traps and tests mosquitoes throughout the county to identify the areas that are at the highest risk, and targets those areas for source reduction and treatment using an integrated vector management program.
Residents with questions, who would like to pick up free mosquitofish, or who would like help with a mosquito problem should contact the Lake County Vector Control District at 707-263-4770 or visit the district Web site at www.lcvcd.org .
For more information about West Nile Virus, visit http://www.westnile.ca.gov/ .