West Nile Virus Still a Threat in Western Placer

ROSEVILLE, Calif. – Eight additional mosquito samples in western Placer County have tested positive for West Nile virus in the past week. A majority of the positive samples were collected from mosquito traps located in the Lincoln area.

“The high temperatures we have been experiencing not only make it easier for West Nile virus to replicate in birds and mosquitoes but also result in more mosquitoes,” said Joel Buettner, General Manager of the Placer Mosquito and Vector Control District. Buettner states that western Placer County will be seeing an increase in mosquito activity. In addition to the West Nile virus vector mosquitoes we have been seeing all summer, the Anopheles mosquitoes are increasing in number as well. These mosquitoes may be aggressive, but are not known vectors for West Nile virus.

With warm temperatures still in the forecast, the District urges residents to implement prevention strategies, such as using an effective repellent, that will decrease the risk of mosquito bites. “While the District continues its West Nile virus surveillance and mosquito control efforts, personal protection is still key at times like these,” Buettner states.

For more information on the different mosquito species in Placer County, contact the Placer Mosquito and Vector Control District at (888) 768-2343 or visit www.placermosquito.org. 2011 Placer County West Nile virus activity update: 3 dead birds, 0 sentinel chickens, 32 mosquito samples, and 0 humans have tested positive for West Nile Virus to date.

Contact: Ada Barros, Public Information Officer,  (916) 343-000

West Nile Virus Still a Threat in Western Placer

ROSEVILLE, Calif. – Eight additional mosquito samples in western Placer County have tested positive for West Nile virus in the past week. A majority of the positive samples were collected from mosquito traps located in the Lincoln area.

“The high temperatures we have been experiencing not only make it easier for West Nile virus to replicate in birds and mosquitoes but also result in more mosquitoes,” said Joel Buettner, General Manager of the Placer Mosquito and Vector Control District. Buettner states that western Placer County will be seeing an increase in mosquito activity. In addition to the West Nile virus vector mosquitoes we have been seeing all summer, the Anopheles mosquitoes are increasing in number as well. These mosquitoes may be aggressive, but are not known vectors for West Nile virus.

With warm temperatures still in the forecast, the District urges residents to implement prevention strategies, such as using an effective repellent, that will decrease the risk of mosquito bites. “While the District continues its West Nile virus surveillance and mosquito control efforts, personal protection is still key at times like these,” Buettner states.

For more information on the different mosquito species in Placer County, contact the Placer Mosquito and Vector Control District at (888) 768-2343 or visit www.placermosquito.org.

2011 Placer County West Nile virus activity update: 3 dead birds, 0 sentinel chickens, 32 mosquito samples, and 0 humans have tested positive for West Nile Virus to date.

Contact: Ada Barros, Public Information Officer,  (916) 343-0009.

West Nile Positive Bird Found in Auburn

Virus activity spreads east.

ROSEVILLE, Calif., – A second dead bird in Placer County to test positive this year for West Nile virus has been found in Auburn. The bird was a western scrub jay, a common bird in the western states.

“This could be an indication that West Nile virus activity is increasing in the foothills area,” said Joel

Buettner, General Manager of the Placer Mosquito and Vector Control District. Buettner reports a decrease in mosquitoes in the surveillance traps along the western Placer County border. This comes on heels of significant mosquito control efforts made by the District in the past week. However, he warns that even though mosquito numbers are low in some areas, West Nile virus is still circulating in Placer County. This new dead bird shows an expanded area of West Nile virus activity. Buettner states that the District has increased surveillance in the area where the bird was found to see if local mosquitoes are also infected.

“This long weekend may signify the end of summer, but as long as temperatures remain warm, we are likely to see more dead birds and infected mosquitoes, which are indicators of continued risk from West Nile virus” states Buettner. While residents are enjoying outdoor activities this weekend, the District urges the use of an effective insect repellent. Meanwhile, the District will continue surveillance and treatment efforts to decrease the risk of exposure to the virus and protect public health.

For more information on recommended repellents, visit www.placermosquito.org. 2011 Placer County West Nile virus activity update: 2 dead birds, 0 sentinel chickens, 24 mosquito samples, and 0 humans have tested positive for West Nile Virus to date.

Contact: Ada Barros, Public Information Officer,  (916) 343-000

Eight New Mosquito Samples Test Positive for West Nile Virus

ROSEVILLE, Calif. – Eight additional mosquito samples in Placer County have tested positive for West Nile virus (WNV) this week, the highest number of positive samples in one week since the beginning of the 2011 mosquito season.

Since the positive mosquito samples came from several of the mosquito traps along the western Placer County border, all the way from Sheridan to the Elverta area just west of Roseville, the Placer Mosquito and Vector Control District is gearing up for a larger-scale response to these results, with mosquito treatments in the rural areas beginning early next week. “We are still working out the details on how we will be conducting treatments across this large area, as well as increasing surveillance,” stated Joel Buettner, General Manager of the District.

According to Buettner, some localized treatments in residential areas of western Placer County were conducted early this morning. The District asks Placer County residents to consider the threat of West Nile virus and protect themselves accordingly this weekend.

The Placer Mosquito and Vector Control District advises the public to implement the 3 Ds of protection:

  • Drain any standing water that may produce mosquitoes.
  • Defend yourself and your home by using an effective insect repellent and dressing protectively when outside, and making sure screens on doors and windows are in good condition.
  • Contact the District for any additional help controlling mosquitoes around your home.

For more information, contact the Placer Mosquito and Vector Control District at (888) 768-2343 or visit www.placermosquito.org. Residents who would like to receive notification on adult mosquito treatments scheduled in Placer County may email pio@placermosquito.org.

2011 Placer County West Nile virus activity update: 1 dead bird, 0 sentinel chickens, 13 mosquito samples, and 0 humans have tested positive for West Nile Virus to date.

Contact: Ada Barros, Public Information Officer,  (916) 343-0009

First West Nile Positive Bird in Placer County

District asks residents to watch for dead birds.

ROSEVILLE, Calif. – The first bird in Placer County to test positive this year for West Nile virus has been found in Rocklin.

“Dead birds provide an early indication of where virus activity is increasing.” said Joel Buettner, general manager of the Placer Mosquito and Vector Control District.

However, public health officials have expressed concerns that the number of dead bird reports coming in from the public have decreased this year. This could affect how quickly West Nile virus hotspots are identified. “Ideally, we’d like to get an indication of West Nile virus activity before we find WNV-positive mosquitoes in an area. Finding WNV-positive dead birds helps direct our surveillance and control efforts,” states Dr. Mary Sorensen, laboratory director for the District.

The Placer Mosquito and Vector Control District urges citizens to report dead birds by calling the California Department of Public Health hotline at (877) 968-2473. Only birds suitable for testing will be picked up, but all reports provide valuable information and assist in control.

The District has also schedules round-based treatments for the early morning on August 12th. Treatment area includes:

  • Elverta area – area north of Rio Linda Blvd to Jackson Road, between Brewer Road and Locust Road, and between Pleasant Grove Rd. and El Modena Ave.

For more information, contact the Placer Mosquito and Vector Control District at (888) 768-2343 or visit www.placermosquito.org.

2011 Placer County West Nile virus activity update: 1 dead bird, 0 sentinel chickens, 5 mosquito samples, and 0 humans have tested positive for West Nile Virus to date.

Contact: Ada Barros, Public Information Officer (916) 343-0009.