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Posts Tagged ‘West Nile encephalitis’

WNV Cases Climb 71%, Deaths Up 89%

Posted by feww on September 6, 2012

2,280 West Nile cases and 87 deaths reported in 2012: CDC

WNV cases have climbed by 71 percent and the deaths by 89 percent since August 21, 2012.

  • WNV cases include 54% neuroinvasive disease cases and 46% nonneuroinvasive disease cases. Three hundred and thirty five WNV presumptive viremic blood donors (PVDs) have been reported as of September 4, 2012, CDC said.
  • About 71  percent of the cases this year have been reported in six states: Texas (45%), South Dakota (6%), Oklahoma (6%), Mississippi (6%), Michigan (5%) and Louisiana (4%).

Epidemic/Epizootic West Nile Virus in the United States


At least 87 people have died from WNV infection in the U.S. so far this year. The 2,280 reported WNV cases include 1,069 (54%) neuroinvasive disease cases and 924 (46%) nonneuroinvasive disease cases. Three hundred and thirty five WNV presumptive viremic blood donors (PVDs) have been reported as of September 4, 2012, CDC said.

Data table  [Sourced from CDC]

Two thousand two hundred eighty (2,280) human West Nile virus infections have been reported to CDC ArboNET from Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, West Virginia, Wisconsin, and Wyoming.

Non-human West Nile virus infections have been reported to CDC ArboNET from the following states:

Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin and Wyoming.

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U.S. Facing Worst Ever WNV Outbreak

Posted by feww on August 25, 2012

West Nile Cases Surge in Louisiana

Louisiana’s Department of Health and Hospitals (LDHH) have confirmed 53 new human cases of the West Nile infections, marking  145 reported cases and 9 deaths so far this year.

At least 31 of the new cases are neuroinvasive disease, which infects the spinal cord and brain and can lead to death, LDHH reported.

  • United States is in the midst of “one of the largest West Nile outbreaks ever seen,” said Dr. Lyle Peterson, director of vector-borne infectious diseases section at CDC.
  • About 1,331 reported cases of the disease have occurred in 38 states including about 640 Neuroinvasive disease cases, leading to at least 46 deaths so far this year.
  • Nine other states have reported “some activity.”
  • Texas, the worst-hit state, has reported 641 cases with 24 deaths so far this year.
  • Since 1999, more than 30,000 people in the United States have been infected with West Nile virus. Occasionally, a person infected with the mosquito-borne disease may develop more severe symptoms including  “West Nile encephalitis,” “West Nile meningitis” or “West Nile meningoencephalitis.” CDC reported.
  • The 1,331 cases thus far in 2012 is the highest number of West Nile virus disease cases reported to CDC through the third week in August since West Nile virus was first detected in the United States in 1999.
  • About 75 percent of the cases have been reported from 5 states (Texas, Mississippi, Louisiana, South Dakota, and Oklahoma) and almost half of all cases have been reported from Texas.
  • About 13,000 of the individuals who have been reported as being infected West Nile virus since 1999 have been seriously ill, and more than 1,200 have died, CDC said.

 WNV Infection Causes Kidney Disease

WNV infection causes serious and lasting kidney damage, according to a new report by Baylor College of Medicine. Researchers found that 4 in 10 patients had varying stages of kidney disease caused by WNV infection.

About 45,000 people in Houston area have been infected with the virus, many of whom are unaware of it, the report said.

West Nile virus (WNV) activity reported to ArboNET, by state, United States, 2012 (as of August 21, 2012)


One thousand three hundred thirty-one (1,331) human West Nile virus infections have been reported to CDC ArboNET from Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Virginia, and Wisconsin.

Other Global Disasters/ Significant Events

  • South Korea. Reactor No. 1 at the Ulchin nuclear power plant located in South Korea’s North Kyongsang province stopped operating on Thursday for “unknown reasons,” the Yonhap news agency reported.

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