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:6/25/2016)... ... June 25, 2016 , ... Experts from ... at AcademyHealth’s Annual Research Meeting June 26-28, 2016, at the Hynes Convention Center ... care topics including advance care planning, healthcare costs and patient and family engagement. ...
(Date:6/25/2016)... ... 2016 , ... First Choice Emergency Room , the largest network of ... Medical Director of its new Mesquite-Samuell Farm facility. , “We are pleased to ... said Dr. James M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. ...
(Date:6/25/2016)... ... June 25, 2016 , ... Conventional wisdom preaches the benefits ... terms of the latter, setting the bar too high can result in disappointment, perhaps ... slow progress toward their goal. , Research from PsychTests.com reveals that ...
(Date:6/24/2016)... , ... June 24, 2016 , ... Marcy was in a crisis. Her son James, ... out at his family verbally and physically. , “When something upset him, he couldn’t control ... use it. He would throw rocks at my other children and say he was going ...
(Date:6/24/2016)... ... June 24, 2016 , ... Comfort Keepers® of San Diego, CA ... the Road To Recovery® program to drive cancer patients to and from their cancer ... ensure the highest quality of life and ongoing independence. Getting to and from ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... , June 24, 2016 ... appointment of Dr. Edward Futcher to ... Director, effective June 23, 2016.Dr. Futcher was also ... and Governance Committees.  As a non-executive member of ... expertise and strategic counsel to VolitionRx in connection ...
(Date:6/23/2016)... Research and Markets has announced the addition of the ... report to their offering. ... failure, it replaces the function of kidneys by removing the ... the treatment helps to keep the patient body,s electrolytes such ... Increasing number of ESRD patients & substantial healthcare expenditure on ...
(Date:6/23/2016)... 2016  In a startling report released today, National Safety ... lacking a comprehensive, proven plan to eliminate prescription opioid overdoses. ... how states are tackling the worst drug crisis in recorded U.S. ... Kentucky , New Mexico , ... Of the 28 failing states, three – Michigan ...
Breaking Medicine Technology:
Cached News: