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Published On: Tue, May 14th, 2013

Final 2012 West Nile numbers released by CDC, Israeli researchers suggest ‘global warming’ contributes to the outbreak of mosquito-borne disease

As promised, the US Centers for Disease Control and Prevention (CDC) have released the final data for West Nile Virus in the US for 2012.

 

mosquito

Photo/CDC

According to the federal health agency numbers, “In 2012, all 48 contiguous states, the District of Columbia, and Puerto Rico reported West Nile virus infections in people, birds, or mosquitoes. A total of 5,674 cases of West Nile virus disease in people, including 286 deaths, were reported to CDC. Of these, 2,873 (51%) were classified as neuroinvasive disease (such as meningitis or encephalitis) and 2,801 (49%) were classified as non-neuroinvasive disease. The numbers of neuroinvasive, non-neuroinvasive, and total West Nile virus disease cases reported in 2012 are the highest since 2003.”

The number of deaths is the highest since cases of WNV disease were first detected in the United States in 1999.

In 2012, 62 percent of all reported West Nile virus cases—were concentrated in California, Louisiana, Michigan, Mississippi,  Oklahoma, South Dakota, and Texas.  Texas reported 33 percent (1,868) of all reported West Nile virus cases in 2012.

Dallas County, Texas alone accounted for 405 human cases of WNV.

The CDC says, “Last summer’s outbreak likely resulted from  many  factors, including higher-than-normal temperatures that influenced mosquito and bird abundance, the replication of the virus in its host mosquitoes, and interactions of birds and mosquitoes in hard-hit areas. Because the factors that lead to West Nile virus disease outbreaks are complex, CDC cannot predict where and when they will occur.”

New research from the University of Haifa in Israel piggybacks on the CDC’s “higher-than-normal temperatures” statement.

In the study commissioned by the European Centre for Disease Prevention and Control (ECDC) in Stockholm, researchers found that rising temperatures have a more considerable contribution than humidity, to the spread of the disease, while the effect of rain was inconclusive.

“These results are an additional testament that global warming contributes to the outbreak of mosquito-borne and other temperature-sensitive vector-borne diseases. The indications to this are piling up in different parts around the globe”, says Dr. Shlomit Paz, who led this research. These findings were recently published in the online scientific journal, Plos One.

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About the Author

- Writer, Co-Founder and Executive Editor of The Global Dispatch. Robert has been covering news in the areas of health, world news and politics for a variety of online news sources. He is also the Editor-in-Chief of the website, Outbreak News Today and hosts the podcast, Outbreak News Interviews on iTunes, Stitcher and Spotify Robert is politically Independent and a born again Christian Follow @bactiman63

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  1. Indiana, Wisconsin, Louisiana, North Dakota and Idaho report their first cases of West Nile virus of 2013 - The Global Dispatch says:

    […] In 2012, all 48 contiguous states, the District of Columbia, and Puerto Rico reported West Nile virus infections in people, birds, or mosquitoes. A total of 5,674 cases of West Nile virus disease in people, including 286 deaths, were reported to CDC. […]

  2. West Nile virus in the US hits double digits - The Global Dispatch says:

    […] Disease Control and Prevention (CDC) reported 2,374 WNV cases and 114 deaths. This was a far cry from the 2012 outbreak that had a final total of  5,674 cases of West Nile virus disease in people, including 286 […]

  3. California accounts for a third of all human West Nile virus cases | Outbreak News Today says:

    […] Disease Control and Prevention (CDC) reported 2,374 WNV cases and 114 deaths. This was a far cry from the 2012 outbreak that had a final total of  5,674 cases of West Nile virusdisease in people, including 286 […]

  4. West Nile fever reported in Dallas County | Outbreak News Today says:

    […] the 2012 West Nile virus (WNV) outbreak that affected 5,674 people and killing 286, Dallas County was considered the epicenter of the […]

  5. Iowa sees first human West Nile virus case of 2014 in Clay County man - The Global Dispatch says:

    […] Control and Prevention (CDC) reported 2,374 WNV cases and 114 deaths in 2013. This was a far cry from the 2012 outbreak that had a final total of  5,674 cases of West Nile virus disease in people, including 286 […]

  6. Mississippi reports first West Nile virus case of the year - The Global Dispatch says:

    […] Disease Control and Prevention (CDC) reported 2,374 WNV cases and 114 deaths. This was a far cry from the 2012 outbreak that had a final total of  5,674 cases of West Nile virus disease in people, including 286 […]

  7. West Nile virus case count nears 300 nationally, 11 deaths reported - The Global Dispatch says:

    […] total West Nile situation in the US is a far cry from the 2012 outbreak that had a final total of  5,674 cases of West Nile virus disease in people, including 286 […]

  8. San Juan County boy is first human West Nile virus case in New Mexico - The Global Dispatch says:

    […] In 2012, all 48 contiguous states, the District of Columbia, and Puerto Rico reported West Nile virus infections in people, birds, or mosquitoes. A total of 5,674 cases of West Nile virus disease in people, including 286 deaths, were reported to CDC. […]

  9. Indiana, Wisconsin, Louisiana, North Dakota and Idaho report their first cases of West Nile virus of 2013 - The Global Dispatch says:

    […] In 2012, all 48 contiguous states, the District of Columbia, and Puerto Rico reported West Nile virus infections in people, birds, or mosquitoes. A total of 5,674 cases of West Nile virus disease in people, including 286 deaths, were reported to CDC. […]

  10. Mississippi human West Nile virus tally now at seven cases, about two dozens cases reported nationwide to date - The Global Dispatch says:

    […] Related story: Final 2012 West Nile numbers released by CDC, Israeli researchers suggest ‘global warming’ contr… […]

  11. Africa's Road To COP18 - Global Warming Trends Contribute to Spread of West Nile Virus to New Regions … – Science Daily (press release) says:

    […] disease wasn't present before, according to a new study by the University of Haifa. The …Final 2012 West Nile numbers released by CDC, Isr…The Global DispatchHaifa U links West Nile Virus to global warmingJerusalem […]

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