Friday, July 26, 2013

West nile virus cases popping up all over...all these were just one day!

West Nile virus found in East San Jose, spraying to begin Friday San Jose Mercury News
SAN JOSE - For the first time, a neighborhood in East San Jose has mosquitoes that tested positive for the West Nile virus and Santa Clara County plans to treat ...
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West Nile virus found in Cass County Jamestown Sun
Three pools of mosquitoes in Cass County tested positive for West Nile virus Tuesday, Vector Control reported. In response, the cities of Fargo, Moorhead, Minn., ...
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West Nile Virus Confirmed in Twin Falls County Twin Falls Times-News
TWIN FALLS- South Central Public Health District (SCPHD) officials and the Twin Falls County Pest Abatement District (TFCPAD) have confirmed West Nile ...
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West Nile kills first Hoosier of 2013 Southeast Indiana Journal and Courier
INDIANAPOLIS — The state's first human case of West Nile virus this year has been reported in southeastern Indiana while mosquitoes in nine counties have ...
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West Nile Virus confirmed in Winnebago County The Oshkosh Northwestern
The majority of people who are exposed to West Nile Virus do not get sick. Those who do usually experience mild symptoms such as fever, headache, or rash.
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West Nile mosquitoes found in two Naperville parks Chicago Daily Herald
Tests of mosquito traps at Seager Park, 1163 Plank Road, and Springhill Park, 703 Springhill Circle, found one instance of West Nile virus at each location, ...
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West Nile Virus detected in Addison County mosquito pool Mountaintimes
LEICESTER - The Vermont Department of Health announced July 22 that West Nile virus was detected in mosquitoes collected on July 10 from a trap in ...
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West Nile virus found in mosquitos, birds from Riverside County abc7.com
RIVERSIDE, Calif. (KABC) -- The West Nile virus has been found in mosquitos collected from the Nuevo area and San Jacinto, according to the Riverside ...
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West Nile virus found in Cass mosquitoes; spraying tonight in FM area In-Forum
FARGO – Three pools of mosquitoes that test positive for West Nile virus were found Tuesday in Cass County, the county vector control office reported.
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West Nile virus found in Douglas County test pool Nevada Appeal
“All horse owners should update their animal's West Nile virus vaccination,” said Dr. Annette Rink, acting state veterinarian and supervisor of the Animal Disease ...
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Blogs 10 new results for west nile
First human case of West Nile virus reported in Ripley Co. | Fox 59 ... mattadamsfox59
INDIANAPOLIS — Health officials say the first human case of West Nile virus in Indiana has been reported in Ripley County. State health officials are urging ...
Fox 59 News - fox59.com
First case of neuroinvasive West Nile Virus reported - WAFB 9 News ... Michael Oliver
The first case of West Nile Virus in Louisiana this year has been diagnosed in Caldwell Parish.
WAFB - Local News
FIRST HUMAN CASE OF WEST NILE VIRUS REPORTED FOR ... Kathy Bottorff
 07/25/13 The first human case of West Nile virus in Indiana has been reported in Ripley County, State health officials announced today.Â...
WTCA AM1050 The Chief
First Reported Case Of West Nile For Season In Ripley County ... Network Indiana
A person in Ripley County has West Nile Virus, a disease contracted through contact with mosquitos.
WFIU Local News Podcast
Person In Ripley County Has West Nile Virus | Indy's News Center ... by Ray Steele - rsteele@wibc.com | @WIBC_RaySteele
For the first time in 2013, a person in Indiana has West Nile Virus. An epidemiologist says it isn't time to panic, but says we should do what we can to avoid ...
WIBC News
1st human case of West Nile virus reported in ND - Bradenton.com
State health officials have confirmed the first human case of West Nile in North Dakota.
Bradenton Herald -- Health
West Nile Virus Found in Twin Falls County - News Radio 1310 KLIX Benito Baeza
TWIN FALLS, Idaho (KLIX)- Health officials in Southern Idaho say mosquitoes have tested positive for West Nile Virus in Twin Falls County. According to the.
95.7 KEZJ - Southern Idaho's New Country
1st human West Nile infection of 2013 in N.D. confirmed | WDAZ ...
BISMARCK, ND -- The first human case of West Nile Virus in North Dakota this year has been confirmed. State health officials are urging people to protect ...
Homepage | WDAZ | Grand Forks, ND
Toronto mosquitoes test positive for West Nile Virus | Metro Staff
Mosquitoes in Toronto have tested positive for West Nile Virus for the first time this year. Toronto Public Health keeps 43 mosquito traps around the city and ...
Metro News
Web 6 new results for west nile
Human West Nile case confirmed in Indiana - WTHI TV 10 Terre Haute
In a report sent to News 10, the Indiana State Department of Health has confirmed the first human case of West Nile virus in Indiana. This case has been ...
www.wthitv.com/dpp/.../human-west-nile-case-confirmed-in-i...
West Nile found in mosquito sample; Pittsfield will spray - Berkshire ...
The Massachusetts Department of Public Health has confirmed the presence of West Nile Virus in a sample of mosquitoes collected in the Pittsfield.
www.berkshireeagle.com/.../west-nile-found-mosquito-sample...
First human case of West Nile reported in Indiana - WANE.com
INDIANAPOLIS, Ind. (WANE) - Indiana health officials announced Wednesday that the first human case of West Nile virus has been reported in Ripley County, ...
www.wane.com/.../first-human-case-of-west-nile-reported-in-i...
Dead birds test positive for West Nile in Neenah - WLUK Fox 11
Two dead crows have tested positive for West Nile virus in Winnebago County.
www.fox11online.com/.../dead-birds-test-positive-for-west-nil...
Mosquito with West Nile virus first for Lehigh County in 2013 ... - WFMZ
Lehigh County has recorded its first case of West Nile virus this year.
www.wfmz.com/news/news...with.../-/index.html
First human case of West Nile virus reported in Ripley Co. | Fox 59 ...
INDIANAPOLIS — Health officials say the first human case of West Nile virus in Indiana has been reported in Ripley County. State health officials are urging ...
fox59.com/.../first-human-case-of-west-nile-virus-reported-in-...

Tuesday, July 23, 2013

It’s not the hordes of mosquitoes biting you in the spring that you have to worry about. It’s that old, scraggly mosquito that’s still around in August

 
This summer’s multiple heavy rains have contributed to the number of mosquitoes, but only marginally, McLean said. Each storm typically results in another brood of bugs showing up within a week or two. But, so far at least, we’re within the normal range for hatches.
 
“In a typical summer, we’ll have six to eight broods,” he said. “This year, we’re on our sixth brood. Last year, the rain stopped in late July and everything dried out in August. We don’t know what’s going to happen next.”
 
Because the backlog of hatches has caught up, the worst of the bug baby boom is likely behind us. But those bugs aren’t going away. We’ll merely return to the normal levels.
 
And, as we head into August, we’re in the prime season for the spread of the West Nile virus. “We’re not out of the woods yet,” McLean warned.
 
Mosquitoes that have spent the first part of the summer biting birds — where West Nile originates — spend the last half of the summer biting humans, which is how the disease is passed on.
 
“The typical thinking is that the more bugs that are biting you, the higher your chances are of getting a disease, but that’s not true,” McLean said. “It’s not the hordes of mosquitoes biting you in the spring that you have to worry about. It’s that old, scraggly mosquito that’s still around in August.”
 
That’s why McLean urges people to stay diligent about repelling mosquitoes.
 
“People tend to put on lots of repellent early in the year when the bugs are heavy but then cut back in August,” he said. “Don’t do that.”
 
Last year saw a startling surge in the West Nile virus, with 70 confirmed cases in the state, compared with only two in 2011.
 
With so many variables, experts aren’t predicting how bad the disease might be this year, but they’re thinking that one reason for last year’s surge was the ultra-early spring that resulted in a much longer-than-normal bug season.
 
If that’s the case, there actually might be a silver lining to our long wait for summer this year.
 
 

West Nile Virus Threat Looms in Cook County

Officials at the Cook County Department of Public Health say weather over the last week has provided an ideal breeding ground for West Niles Virus-carrying mosquitos, and residents need to take precautions right now.                 
Mosquito pools in nine suburban Cook County communities, including Wheeling, have already tested positive for West Nile Virus-carrying Culex mosquitos. Photo credit: Cook County Department of Public Health.
        
Mosquito pools in nine suburban Cook County communities, including Wheeling, have already tested positive for West Nile Virus-carrying Culex mosquitos. Photo credit: Cook County Department of Public Health.              
Cook County Department of Public Health (CCDPH) officials say now is the time to take simple, but effective precautions to help protect you and your family against contracting West Nile Virus from the Culex mosquito, which carries the disease.
After recent heavy rains, Amy Poore, director of public relations for the Cook County Department of Public Health, says residents should empty any items in and around their homes that have collected water, such as old tires, bird baths, baby pools, buckets and other objects.

Poore said these areas provide the most ideal breeding ground for Culex mosquito.
“This is really the time to pay attention, you can reduce your risk by making sure there are no tears in your screens at home, wear repellant with DEET, oil of lemon Eucalyptus or Picaridin between dusk and dawn and keep your gutters clean,” Poore said.

Residents also are advised to keep yard grass cut short, because tall grass also is an ideal area where the Culex mosquito can breed.

Poore said surveillance to identify Culex mosquitos already has been conducted by the CCDPH, in addition to Mosquito Abatement districts in Cook County. Mosquito traps are set in suburban Cook County communities to determine if the insects are carrying West Nile Virus.
Though there are no reported human cases yet in Cook County, Poore said more than 2,000 mosquito pools already have tested positive in Wheeling, Evanston, Skokie, Alsip, Evergreen Park, Forest Park, Hillside, Hodgkins and Oak Park.

Because of the lapse time between trapping the mosquitos and determining if they are indeed carrying West Nile, Poore said it is possible that mosquitos carrying the virus are spreading to neighboring communities - so taking precautions now is even more important.

Cook County residents can also help to curb the spread of the Culex mosquito by reporting any dead birds they observe. Poore said many times, mosquitos feed on dead birds that are carrying West Nile.
If you observe a dead bird near you, you are urged to report it to the CCDPH online or call 708-633-8025 immediately.

For more information on West Nile Virus and how to protect you and your family, visit the Cook County Department of Public Health website.

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Wednesday, July 17, 2013

Who Gets More Mosquito Bites Why some people are itching and scratching while others seem unaffected

Why do some people attract mosquito bites more than others? Heidi Mitchell explains on Lunch Break.

It is peak mosquito season, and while some lucky outdoor venturers seem unperturbed by the tiny insects, others appear to be relentlessly assaulted. Scientists are trying to understand what makes certain humans more attractive to the bugs. One expert, molecular vector biologist L.J. Zwiebel, a professor of biological sciences at Vanderbilt University, weighs in.

Sweet Smell of Success

Mosquitoes find their mammalian prey through sensing the heat and carbon dioxide mammals emit. Pregnant women and larger people are sometimes the victim of multiple attacks, since they exert more energy than the average person.

Mosquitoes are also guided by their sense of smell. "Despite what my grandmother told me, I don't have sweet blood," says Dr. Zwiebel, since mosquitoes cannot distinguish blood quality. "Mosquitoes are attracted to our human odor, and that is largely a consequence of the bacteria on our skin," says Dr. Zwiebel. The "flora and fauna on our skin" also smell appetizing to mosquitoes, says Dr. Zweibel, and these can increase when we sweat or spend a lot of time outdoors.

As far as Dr. Zwiebel knows, there is no scientific basis to prove that having high cholesterol or diabetes, despite what some websites claim, will keep bugs away. Nor will taking vitamin B supplements, eating garlic or taking specific medications.

Skeeter Immunity

Reuters
A culex quinquefasciatus mosquito.

After 20 years in labs with the biting bugs, Dr. Zwiebel says he can stick his arm into a container of mozzies and be bit hundreds of times, yet "not have a hair out of place." Children, who have been bitten far fewer times than adults, may have stronger reactions to bites, since their immune systems haven't matured fully. But adults who are convinced they are being victimized by the bloodsuckers usually are not. "There are some people who have strong allergic responses to the bites which may make it seem like they're being bit more often, but they're probably not," Dr. Zwiebel notes.

Fighting Back

For people covered in welts and itchy wounds, Dr. Zwiebel says to stop scratching: When the mosquito bites, it leaves behind some of its saliva, a substance that contains anticoagulants and a local anesthetic, among other things. The body recognizes it as a foreign invader and sends histamines in to counterattack. Scratching just spreads the saliva and encourages the release of more antibodies, and more itching—a vicious cycle.

Those who swell up and itch a lot when bitten "should speak with their doctor about taking an over-the-counter antihistamine daily as a precaution," says Dr. Zwiebel. The bugs will still bite, but you may not notice, since the drug prevents the allergic response that turns a painless bite into an itchy nuisance.

Cleaner Is Meaner

Female mosquitoes are driven to bite you as they need a blood meal to complete their reproductive cycle and produce fertile eggs, which takes a huge boost of protein. To reduce the chances of being bitten, wash with an antibacterial soap to reduce the volume of mosquito-attracting bacteria on your skin.

Other ways to dodge bites: Avoid the outdoors at dawn and dusk, when mosquitoes are most active. Set up an outdoor fan to shoo bugs away. And wear long trousers and shirts if it's not too hot. Dr. Zwiebel also suggests spraying your clothing with repellent that contains DEET, a chemical that acts to confuse the mosquito's olfactory receptors. "It works, and until something better comes along, it's the best thing available to prevent bites," he says.

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West Nile virus outbreaks will flare up, experts say

West Nile virus outbreaks are likely to flare up in the coming years, spurred on by warmer, longer mosquito seasons coupled with cuts in disease-control funding that leave authorities unprepared, according to two new studies.

After an all-time high in 2003 with nearly 10,000 cases and 264 dead, the virus backed off gradually for the remainder of the decade — until last year. In 2012, there were 5,674 cases and 286 deaths, almost twice the 2003 mortality rate.

Graphic
Resurgence of the West Nile virus in 2012 was an unpredictable outbreak.
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Resurgence of the West Nile virus in 2012 was an unpredictable outbreak.
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West Nile virus likely to flare up in coming years, experts say

West Nile virus likely to flare up in coming years, experts say
Longer mosquito seasons and less funding to control the disease can lead to a resurgence, studies say.

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This strong resurgence is suggestive of “unpredictable local and regional outbreaks” to come, according to a study by the Centers for Disease Control and Prevention. Even when the number of infections dies down, the virus remains in circulation with an ever-present danger of periodic recurrences.

“Every once in a while, you will have the right conditions to have it build up in the mosquito and bird populations, and spill over to humans,” said Stephen M. Ostroff, formerly of the CDC, who wrote an editorial in the Journal of the American Medical Association (JAMA) that accompanied the studies.
“Our sense of urgency and the degree of attention paid to West Nile virus has diminished considerably and so, too, have the necessary resources to prevent another outbreak,” Ostroff said.
Two studies — a review of the West Nile virus from the CDC and an investigation of a 2012 West Nile epidemic in Dallas from Dallas County Health and Human Services — were published online Tuesday in JAMA, along with the editorial by Ostroff. The Dallas investigation studied 173 cases of West Nile neuroinvasive disease, 225 cases of West Nile fever and 19 deaths in the latter half of 2012.

Transmitted mostly by mosquitoes that have bitten infected birds, the virus made its first U.S. appearance in 1999.

The Dallas study cites the combined effect of a mild winter, the early arrival of spring and summer heat, and lots of rain that caused mosquitoes to hang around for longer than usual, allowing more infection to spread.

Meanwhile, funding toward prevention and control has fallen. The CDC’s Epidemiology and Laboratory Capacity for Infectious Diseases program — which distributes money to states and large cities for use against mosquito-borne diseases — saw its funding drop from nearly $35 million in the early 2000s to less than $10 million by 2012.

Ostroff, the former deputy director of the CDC’s National Center for Infectious Diseases, believes it is a result of growing apathy toward the West Nile virus.

“It seemed like the problem had gone away, and it was an easy place to cut,” he said.
Complacency arises from a belief that a disease is on its way out, but that attitude can be dangerous because some diseases follow more of a boom-and-bust pattern. For instance, experts in the late 1980s thought that tuberculosis could be virtually eliminated from the United States by 2010. An unexpected resurgence of TB a few years later, largely fueled by the onset of the HIV epidemic, hit hard — particularly since funding and TB control programs had been eliminated.

While many states keep an eye out for West Nile infections in humans, the CDC study stresses that early detection in the carriers themselves is key. To wait for people to become exposed to the virus, have it manifest as an infection or illness, visit a doctor and test positive for West Nile virus could cause authorities to lose weeks in the war against an outbreak.

On the other hand, mosquito traps and tests are inexpensive and certainly cheaper than some of the last-resort measures eventually used to bandage up situations such as the Dallas outbreak. The study cited costs of $1.6 million for aerial pesticide spraying and $8 million in estimated West Nile-related health-care costs.

By cutting funding for mosquito surveillance, “we’re being penny-wise and dollar-foolish,” Ostroff said.

If an infection problem is identified early, authorities can try to prevent swarms of mosquitoes from reaching human hosts by draining blocked streams, introducing predatory fish and applying larvicides to prevent spring hatching.

No human vaccine or specific treatment exists. Wearing bug spray does reduce one’s risk of West Nile virus, but the CDC study said people are unlikely to put on repellant regularly, even during well-publicized outbreaks. Advice to wear long pants and sleeves is also unlikely to be followed, especially in the sweltering heat of peak mosquito season.

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