HOME >> BIOLOGY >> NEWS
Mosquitoes infected with La Crosse encephalitis found in four Southwest Virginia counties

Blacksburg, Va. -- Virginia Tech entomologists have documented for the first time the presence of mosquitoes infected with La Crosse virus in four Southwest Virginia Counties.

Sally Paulson, an associate professor of entomology, said the find from samples taken last year and recently analyzed was surprising because no human cases of the disease had been reported in the counties before.

"It surprised me to get so many positives from so few samples from a place I wouldn't have expected any," Paulson said.

The counties in which the positive samples were collected for the first time were Montgomery, Giles, Pulaski, and Floyd. The disease had previously been found in the counties of Wise, Dickenson, Buchanan, and Tazewell. About 15 human cases of La Crosse encephalitis have been reported in Virginians in the past 10 years.

The positive results were returned from approximately 135 "pools," samples containing a number of mosquitoes captured at individual locations. Because the laboratory report only reports a positive result from a pool, Paulson said it is impossible to say exactly how many individual mosquitoes were infected.

"We had seven positives reported, and our collecting methods did not target the species that carry La Crosse virus," she said. Paulson and her graduate students collected the samples as part of a project to check for West Nile virus. Different mosquito species are implicated in the two diseases.

The mosquitoes that spread La Crosse virus are members of the Aedes and Ochlerotatus genera. The Eastern Tree Hole Mosquito is the primary vector for the disease, though the Asian Tiger Mosquito has also been implicated in its spread. Both live in woodland habitats but can be abundant in urban and suburban areas.

According to a fact sheet on the disease from the Centers for Disease Control, about 70 people are infected with La Crosse encephalitis nationwide each year, though the agency considers the num
'"/>

Contact: Stewart MacInnis
macinnis@vt.edu
540-231-5863
Virginia Tech
30-May-2003


Page: 1 2

Related biology news :

1. Rutgers-Newark scientist: Mosquitoes may carry lethal parasite
2. Mosquitoes vs. malaria: How we can win the fight
3. Mosquitoes repelled by tomato-based substance
4. Mosquitoes have discriminating tastes, UF researchers find
5. Curing Malaria, Controlling Mosquitoes Symposium Set For AAAS Meeting
6. UF Researcher Designs Pill To Control Mosquitoes
7. Late invasion of infected cells into the brain causes HIV dementia say Temple researchers
8. Children with HIV more likely to utilize health services than infected adults
9. Salmonella uses molecular staples to change structure of infected cells
10. Antiretroviral therapy in HIV-infected children can stop neurological damage
11. Loss of lean body mass in HIV-infected men linked to immunological processes

Post Your Comments:
(Date:7/24/2014)... 24, 2014) Scientists at The New York ... step closer to creating a viable cell replacement ... cells. , For the first time, NYSCF ... from skin samples of patients with primary progressive ... protocol to induce these stem cells into becoming ...
(Date:7/24/2014)... 2014) Scientists at The New York Stem ... closer to creating a viable cell replacement therapy ... , For the first time, NYSCF scientists ... skin samples of patients with primary progressive multiple ... to induce these stem cells into becoming oligodendrocytes, ...
(Date:7/24/2014)... identified two factors that characterize sustainable university and ... highly qualified physics teachers. Specifically, one or more ... education in combination with institutional motivation and commitment ... Technology, Engineering and Math (STEM) teacher shortages are ... the way for institutions seeking to increase the ...
Breaking Biology News(10 mins):NYSCF scientists one step closer to cell therapy for multiple sclerosis patients 2NYSCF scientists 1 step closer to cell therapy for multiple sclerosis patients 2Creating sustainable STEM teacher preparation programs 2
(Date:7/24/2014)... 2014 -- A novel combination of microscopy and data ... Oak Ridge National Laboratory an unprecedented look at the ... and electrochemical properties. , The research team led ... surface of a perovskite manganite, a complex material that ... to understand surface behavior could benefit researchers who are ...
(Date:7/24/2014)... BURLINGAME, Calif. , July 24, 2014  ECC ... Denver, Colorado with University College Hospital ... of a development project to finance, design, construct, and ... Ibadan, Nigeria . Under the first ... and prepare scoping documents and funding applications. UCH Ibadan ...
(Date:7/24/2014)... Professor of Engineering at the University of Delaware, ... problems in energy engineering, environmental sustainability and electronics. ... porous rock with a well-defined, crystalline structure. At ... precisely decided that zeolites can separate molecules with ... angstrom (one-tenth of a nanometer), making them useful ...
(Date:7/24/2014)... 2014 Your cell phone may ... lithium-ion battery storage capacity. , New research indicates ... model created at Lawrence Livermore National Laboratory ... how carbon components will perform as electrodes. , ... urgent need for higher-performance batteries. Several key characteristics ...
Breaking Biology Technology:ORNL study reveals new characteristics of complex oxide surfaces 2ECC Signs a Contract for the Finance, Design, and Construction of a Premier Cancer Institute in Ibadan, Nigeria 2University of Delaware researcher describes new approach for creating organic zeolites 2Getting More Life out of Lithium-ion Batteries 2
Cached News: