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2011 thread here
CDC http://www.cdc.gov/ncidod/dvbid/westnile/index.htm has not yet begun compiling human case data for 2012. Cases in animals are making the news indicating that transmission has begun:
Horse put down after contracting West Nile Virus
HARRISBURG (PA) -- A horse has been euthanized due to an active case of West Nile in Northampton County.
This case heralds the arrival of West Nile Virus in 2012 and is the earliest report of a horse illness since the disease reached Pennsylvania in 2000, according to Kevin Sunday, spokesman for the Pennsylvania Department of Environmental Protection. This case also serves as a reminder to vaccinate horses against the virus.
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The California Department of Public Health maintains an excellent website on WNV. They are reporting 3 dead birds from 3 counties with WNV so far in 2012.
The site also has a useful synopsis of WNV in California from 2003 to 2011 adapted below;
2003-2011 WNV ACTIVITY SUMMARY
Year ----------------2003--2004--2005--2006--2007--2008--2009--2010--2011--Total
Human cases (fatal)--3a(0)--779(29)--880(19)--278(7)--380(21) --445(15)--112(4)--111(6)--158(9)--3,146(110)
Horses----------------1b--540--456--58--28--32--18--19--15--1,167
Dead birds----------96--3,232--3,046--1,446--1,396 --2,569--515--416--688--13,404
Mosquito samples ---32--1,136--1,242--832--1,007--2,003 --1063--1305--2,087--10,707
Sentinel chickens ---70--809--1,053--640--510--585--443--281--391--4,782
Squirrels------------0--49--48--32--26--32--10--24--24--245
a There were 20 imported human cases. b There were 3 imported horse cases.
CDC http://www.cdc.gov/ncidod/dvbid/westnile/index.htm has not yet begun compiling human case data for 2012. Cases in animals are making the news indicating that transmission has begun:
Horse put down after contracting West Nile Virus
HARRISBURG (PA) -- A horse has been euthanized due to an active case of West Nile in Northampton County.
This case heralds the arrival of West Nile Virus in 2012 and is the earliest report of a horse illness since the disease reached Pennsylvania in 2000, according to Kevin Sunday, spokesman for the Pennsylvania Department of Environmental Protection. This case also serves as a reminder to vaccinate horses against the virus.
...
The California Department of Public Health maintains an excellent website on WNV. They are reporting 3 dead birds from 3 counties with WNV so far in 2012.
The site also has a useful synopsis of WNV in California from 2003 to 2011 adapted below;
2003-2011 WNV ACTIVITY SUMMARY
Year ----------------2003--2004--2005--2006--2007--2008--2009--2010--2011--Total
Human cases (fatal)--3a(0)--779(29)--880(19)--278(7)--380(21) --445(15)--112(4)--111(6)--158(9)--3,146(110)
Horses----------------1b--540--456--58--28--32--18--19--15--1,167
Dead birds----------96--3,232--3,046--1,446--1,396 --2,569--515--416--688--13,404
Mosquito samples ---32--1,136--1,242--832--1,007--2,003 --1063--1305--2,087--10,707
Sentinel chickens ---70--809--1,053--640--510--585--443--281--391--4,782
Squirrels------------0--49--48--32--26--32--10--24--24--245
a There were 20 imported human cases. b There were 3 imported horse cases.
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