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West Nile virus activity – United States, 2009.
Abstract: West Nile virus (WNV) was first detected in the Western Hemisphere in 1999 in New York City and has since caused seasonal epidemics of febrile illness and neurologic disease across the United States, where it is now the leading cause of arboviral encephalitis. This report updates a previous report and summarizes WNV activity in the United States reported to CDC in 2009. A total of 38 states and the District of Columbia (DC) reported 720 cases of WNV disease. Of these, 33 states and DC reported 386 cases of WNV neuroinvasive disease, for an incidence of 0.13 per 100,000 population. The five states with the highest incidence of WNV neuroinvasive disease were Mississippi (1.05 per 100,000), South Dakota (0.74), Wyoming (0.73), Colorado (0.72), and Nebraska (0.61). Neuroinvasive disease incidence increased with increasing age, with the highest incidence among persons aged >or=70 years. A total of 33 WNV deaths were reported, 32 from neuroinvasive disease. Calculating from the number of neuroinvasive disease cases and projections from 1999 serosurvey data, CDC estimated that 54,000 persons were infected with WNV in 2009, of whom 10,000 developed nonneuroinvasive WNV disease. The continuing disease burden caused by WNV affirms the need for ongoing surveillance, mosquito control, promotion of personal protection from mosquito bites, and research into additional prevention strategies.
Publication Date: 2010-07-02 PubMed ID: 20592686 The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
Summary
This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.
The research article discusses the activity of the West Nile Virus, a mosquito-borne disease, across the United States in 2009. It talks about the spread of the disease, the regions which were majorly affected, the age-group most susceptible, the nature of the disease, and the preventive measures that need to be adopted.
Summary of the West Nile Virus Activity in the U.S in 2009
In 1999, the West Nile virus (WNV) was first detected in the Western Hemisphere, specifically in New York City. It soon became the leading cause of arboviral encephalitis, causing regular seasonal epidemics. By 2009, it had spread across the country, with 720 cases of the WNV disease reported from 38 states and the District of Columbia (DC).
- The cases included 386 instances of WNV neuroinvasive disease reported from 33 states and DC.
- The incidence of this disease was 0.13 per 100,000 population.
- The five states with the highest incidence of WNV neuroinvasive disease were Mississippi, South Dakota, Wyoming, Colorado, and Nebraska.
Demographic Impact
According to the research, the incidence of WNV neuroinvasive disease increased with age. People aged 70 years and older were most susceptible to the disease.
- In 2009, 33 deaths were attributed to WNV, with 32 of them resulting from the neuroinvasive variety of the disease.
Disease Estimation and Prevention
Working with the data they had, the Center for Disease Control and Prevention (CDC) estimated that around 54,000 people were infected with WNV in 2009. Out of these people, approximately 10,000 developed nonneuroinvasive WNV disease.
- Considering the continued disease burden caused by West Nile Virus, the report underscores the importance of ongoing surveillance, mosquito control, promotion of personal protection from mosquito bites.
- It also suggests researching additional strategies for prevention.
This study sheds light on the impact of WNV in different components of the population and emphasizes the need for continued efforts to control and prevent the spread of this disease. It provides essential groundwork for the formulation of new strategies for disease management and prevention.
Cite This Article
APA
(2010).
West Nile virus activity – United States, 2009.
MMWR Morb Mortal Wkly Rep, 59(25), 769-772.
Publication
Researcher Affiliations
MeSH Terms
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Animals
- Bird Diseases / epidemiology
- Birds
- Child
- Child, Preschool
- Culicidae / virology
- Female
- Horse Diseases / epidemiology
- Horses
- Humans
- Incidence
- Infant
- Male
- Middle Aged
- Population Surveillance
- United States / epidemiology
- West Nile Fever / complications
- West Nile Fever / diagnosis
- West Nile Fever / epidemiology
- West Nile virus
- Young Adult
Citations
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- Lindsey NP, Brown JA, Kightlinger L, Rosenberg L, Fischer M. State health department perceived utility of and satisfaction with ArboNET, the U.S. National Arboviral Surveillance System. Public Health Rep 2012 Jul-Aug;127(4):383-90.
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