West Nile Virus Activity in Brazos County

Year

Human WNND*

Human WNF*

Mosquito

Bird

Horse

Total

2002

0

0

13

2

15

2003

5

0

13

7

25

2004

1

0

5

14

20

2005

0

3

5

1

9

2006

7

7

20

4

38

2007

1

1

2

0

4

2008

4

1

25

0

30

2009

0

0

1

0

1

2010

-

-

-

-

-

*WNND = West Nile Neuroinvasive Disease is the more severe form the disease cause by the West Nile virus which incorporates the central nervous system (West Nile meningitis, West Nile encephalitis, and West Nile meningoencephalitis).

*WNF = West Nile Fever is the form of the disease cause by the West Nile virus that shows no evidence of neuroinvasion.