PRO/AH/EDR> West Nile virus

Published Date: 2012-09-06 16:22:38
Subject: PRO/AH/EDR West Nile virus – USA (13): (national)
Archive Number: 20120906.1283882

WEST NILE VIRUS – USA (13): (NATIONAL)
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A ProMED-mail post
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International Society for Infectious Diseases
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In this posting:

[1] Total West Nile virus activity

[2] Human neuroinvasive disease

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[1] Total West Nile virus activity

Date: Tue 4 Sep 2012

Source: US CDC Division of Vector-Borne Infectious Diseases, West Nile virus [edited]

http://www.cdc.gov/ncidod/dvbid/westnile/Mapsactivity/survcontrol12MapsAnybyState.htm

[The map of the continental USA showing the location of West Nile virus (WNV) activity can be seen at the source URL above. ProMED-mail subscribers are urged to view it. The footnotes to the map and the text of the data table are presented below, and give an idea of the locations of activity. - Mod.TY]

[The map] includes WNV human disease cases, presumptive viremic blood donors, veterinary disease cases, and infections in mosquitoes, birds, and sentinel animals. Presumptive viremic blood donors have a positive screening test, which has not necessarily been confirmed.

Data table

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2280 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. [Clusters are shown in the south-central, northeast, Great Lakes, north-central, and southeast-coastal states. - Mod. TY]

Non-human West Nile virus infections [in veterinary disease cases and infections in mosquitoes, birds, and sentinel animals] 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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[2] Human neuroinvasive disease

Date: Tue 4 Sep 2012

Source: US CDC Division of Vector-Borne Infectious Diseases, West Nile virus [edited]

http://www.cdc.gov/ncidod/dvbid/westnile/Mapsincidence/survcontrol12IncidbyState.htm

[The map of the continental USA showing the location of West Nile virus neuroinvasive disease can be seen at the source URL above. The footnotes to the map and the text of the data table are presented below, and give an idea of the locations of activity. - Mod.TY]

Incidence by state map data description: West Nile virus neuroinvasive disease incidence maps reflect surveillance reports released by state and local health departments to CDC’s ArboNET system for public distribution. Map shows the incidence of human neuroinvasive disease (encephalitis, meningitis, and/or acute flaccid paralysis) by state for 2012 with shading ranging from .01 to 0.24, 0.25 to 0.49, 0.50 to 0.99, and greater than 1.0 per 100,000 population.

Data table

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Neuroinvasive disease cases have been reported to CDC ArboNET from the following states: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Virginia, West Virginia, Wisconsin, and Wyoming. [Clusters of states with the highest incidence are in the south-central region (Texas, Louisiana, and Mississippi), Michigan, and North and South Dakota. - Mod.TY]

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Communicated by:

ProMED-mail

promed@promedmail.org

[As the WNV transmission continues, WNV activity has been detected in all states in the continental USA. Additional cases can be expected until killing frosts halt mosquito transmission of the virus to humans, equine animals, and birds. Although equine animals can be protected by vaccination, no vaccine is commercially available for human use, so avoidance of mosquito bites (the "fight the bite" campaign) is the best way to avoid human cases.

In addition to the URLs for the maps given above, a HealthMap/ProMED-mail map showing the locations of the states mentioned in this report can be accessed at http://healthmap.org/r/1hiS. - Mod.TY]

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