HOME >> MEDICINE >> NEWS
Shift in feeding behavior of mosquitoes sheds light on West Nile virus outbreaks

Since its introduction to the United States in 1999, West Nile virus has become the major vector-borne disease in the U.S., with 770 reported deaths, 20,000 reported illnesses, and perhaps around a million people infected. The virus is transmitted by Culex mosquitoes (the "vector") and cycles between birds that the mosquitoes feed on. Humans can also be infected with the virus when bitten by these mosquitoes.

Scientists have struggled to explain these large outbreaks in the U.S., which stand in stark contrast to the sporadic European infections. In a new study published in the open access journal PLoS Biology, Drs. Marm Kilpatrick, Peter Daszak, and colleagues now present evidence that the major vector of West Nile virus in the USA, Culex pipiens mosquitoes, change their feeding behavior in the fall from their preferred host, American robins, to humans, resulting in large scale outbreaks of disease.

These feeding shifts appear to be a "continent-wide phenomenon," the researchers conclude, and may explain why West Nile virus outbreaks are so intense in the U.S. compared to Europe and Africa, where the virus originates.

From May through September 2005,Dr. Kilpatrick, senior research scientist with the Consortium for Conservation Medicine, and his team collected mosquitoes and caught birds at six sites in Maryland and Washington, D.C. They determined the changes in mosquito populations throughout the West Nile virus transmission season, the abundance and diversity of bird species at these sites, and tested samples for West Nile virus.

Dr. Kilpatrick says, "To find out which species mosquitoes favored as hosts, we collected thousands of Culex pipiens mosquitoes and selected those that had just fed and still had bloodmeals in them. We sequenced the DNA in the bloodmeal to identify the species of host they had fed on."

Their findings showed that from May to June, the American robin, which represented just 4.5% bird po
'"/>

Contact: Paul Ocampo
press@plos.org
415-624-1224
Public Library of Science
27-Feb-2006


Page: 1 2

Related medicine news :

1. Shift in brains language-control site offers rehab hope
2. Breastfeeding duration rates for infants born in an inner-city WHO/UNICEF Baby-Friendly hospital
3. Breastfeeding and good fats help new moms fight depression
4. Breastfeeding reduces risk of breast cancer for women who delay childbirth
5. New standards could cut number of malnourished children on feeding programs
6. New study shows epidural during birth may negatively affect breastfeeding
7. Breastfeeding overcomes a genetic tendency toward ear infections, scientists discover
8. Concentrated animal feeding operations near schools may pose asthma risk
9. Tracing the history of feeding bubs
10. Hap1 protein links circulating insulin to brain circuits that regulate feeding behavior in mice
11. Over 260 doctors call for ban on force-feeding and restraint chairs at Guantanamo

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:10/13/2017)... ... 2017 , ... While it’s often important to take certain medications during the ... Texas, has identified a solution. , She developed a prototype for MOTION LIGHT-UP PILL ... it eliminates the need to turn on a light when taking medication during the ...
(Date:10/13/2017)... ... October 13, 2017 , ... Southern ... and Jennifer Huggins, PharmD ’17, along with clinical associate professor Janice Frueh, ... cardiovascular diseases during the 15th Annual Women’s Health Conference. The SIU School ...
(Date:10/13/2017)... ... October 13, 2017 , ... The Visiting Nurse Association ... Featuring a collection of specialty vendors and unique items from across the nation, this ... health and wellness services offered by the VNA. The boutique will be open ...
(Date:10/13/2017)... ... October 13, 2017 , ... ... viewers the lowdown on sciatica in a new episode of "Success Files," which ... current events and innovation and investigates each subject in-depth with passion and integrity. ...
(Date:10/12/2017)... (PRWEB) , ... October 12, 2017 , ... ... advisory services for healthcare compliance program management, will showcase a range of technology ... Association for Assisted Living (NCAL) Convention and Expo to be held October 14–18, ...
Breaking Medicine News(10 mins):
(Date:9/22/2017)... , Sept. 22, 2017  As the latest ... Senators Bill Cassidy (R-LA) and Lindsey ... notes that the medical device industry is in an ... device tax, the 2.3% excise tax on medical device ... they also want covered patients, increased visits and hospital ...
(Date:9/19/2017)... 2017   ZirMed Inc ., a recognized leader in ... it has been ranked #1 by its users for the ... 2017 User Survey. ZirMed was recognized as the top-ranked end-to-end ... medical centers over 200 beds and holds one of the ... survey history. ...
(Date:9/13/2017)... ATLANTA , Sept. 13, 2017   OrthoAtlanta ... to the Atlanta Football Host Committee (AFHC) for the 2018 ... Monday, Jan. 8, 2018, at Mercedes-Benz Stadium in ... part of the AFHC "I,m In" campaign, participating in many ... ...
Breaking Medicine Technology:
Cached News: