mosquitoes and wnv

8/14/2019 Mosquitoes and WNV

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FIGHT THE BITECommunity Presentation:

Mosquitoes and West Nile virus

Presentation Developed By:Sacramento-Yolo

Mosquito & Vector Control District


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What Are Mosquitoes?

A mosquito is a two-winged insect whosefemale has a long proboscis to pierce theskin and suck the blood of humans and

animals.


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Mosquito Life Cycle

egg larva pupa adult


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Why Do Females Bite?

Female mosquitoes need to

feed on humans or animals,

such as birds and horses

before they can developeggs.

They suck blood through

their proboscis.

Laying eggs

Proboscis (A)


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Where Do Mosquitoes

Grow?Mosquitoes lay their eggs in standing water.


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What Diseases Can

Mosquitoes Carry?

West Nile Virus

Dog Heartworm

Western EquineEncephalomyelitis


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What Is

West Nile Virus?West Nile Virus (WNV) is a mosquito-

borne virus that can cause disease inhumans, birds, horses, domestic and

wild animals.


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Where Did It

Come From?

The WNV virus wasfirst isolated in the

West Nile district,

Northern Province,

Uganda in 1937.


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When Did It Arrive In

The United States?

WNV was first detected in the

United States during 1999.


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Where Did It Travel?

2000


12/342001


13/342002


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2003


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2004


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2005


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2006
http://www.cdc.gov/ncidod/dvbid/westnile/Mapsactivity/surv&control06Maps_PrinterFriendly.htm


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2007


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2008


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2009 as of July 27th


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Is WNV Dangerous?

West Nile Virus is now the most prevalentmosquito-borne disease in the United

States.


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How does it happen?

The cycle begins when an uninfected female

mosquito bites an infected bird during theperiod (1 to 5 days) that the virus is circulated in

the blood.


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Will I Be Infected?

The majority of

infected individuals

fail to produce a fullset of signs and

symptoms. This is

referred to as aninapparent

infection.

20% West Nile Fever

80%

Asymptomatic


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How Long Do Symptoms

Last?These symptoms can last two to three

weeks with an uneventful recovery or the

disease progressing to involve the centralnervous system (CNS) resulting in severe

disease in roughly 1% of cases:

West Nile Meningitis West Nile Encephalitis

West Nile Poliomyelitis


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Are You At Risk?

* Mosquito exposure

Increased exposure = Increased risk

* Personal characteristics

Age, health, high blood pressure, etc


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How Does The District

Control Mosquitoes?Integrated Pest Management:

Public Education

Surveillance

Biological Control

Physical Control

Chemical Control


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Public Education


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Surveillance


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Biological Control


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Physical Control


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Chemical Control


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What Can You Do?

Follow the District Ds of Prevention

DDRAINRAINStanding Water

DDAWNAWN and DDUSKUSK Are Times To Avoid BeingOutdoors

DDRESSRESS In Long Sleeves & Pants When Outside

DDEFENDEFEND Yourself With An Effective Repellent

DDOORSOORS and Screens Should Be In Good WorkingCondition

DDISTRICTISTRICT Personnel Are Available To Help


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What Else Can I Do?

Educate my community

Tell my neighbors

Report neglected pools

Or other service requests


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Sacramento-YoloSacramento-Yolo

Mosquito and Vector ControlMosquito and Vector Control

DistrictDistrict

1-800-429-1022

www.FIGHTtheBITE.net

mosquitoes and wnv

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