Human West Nile Virus Infections: Colorado, 2003
Updated March 12, 2010

  New cases Clinical diagnosis Total cases Total deaths
Fever Meningitis Encephalitis
County of Residence . 160 36 36 232 7
Adams
Alamosa . 3 . . 3 .
Arapahoe . 104 23 11 138 5
Baca . 5 . . 5 .
Bent . 6 1 . 7 .
Boulder . 367 40 14 421 7
Broomfield . 48 9 5 62 .
Cheyenne . 2 1 1 4 .
Clear Creek . 1 . . 1 .
Conejos . 1 . . 1 .
Crowley . 2 . 2 4 .
Delta . 7 . 3 10 .
Denver . 110 39 13 162 9
Douglas . 27 9 3 39 .
Eagle . 1 . . 1 .
Elbert . 7 1 . 8 .
El Paso . 85 16 13 114 1
Fremont . 69 1 7 77 2
Garfield . 2 . . 2 .
Grand . 1 . . 1 .
Huerfano . 8 1 1 10 .
Jefferson . 110 32 15 157 3
Kiowa . 1 . . 1 .
Kit Carson . 5 . . 5 .
La Plata . 10 3 1 14 .
Larimer . 482 38 26 546 10
Las Animas . 3 . 4 7 1
Lincoln . 4 3 1 8 2
Logan . 69 4 11 84 2
Mesa . 13 4 2 19 2
Moffat . 2 . . 2 .
Montezuma . 5 . . 5 .
Montrose . 5 2 2 9 .
Morgan . 51 3 7 61 .
Otero . 23 4 1 28 2
Park . 1 . . 1 .
Phillips . 21 2 . 23 .
Prowers . 39 1 2 42 .
Pueblo . 136 35 12 183 6
Rio Grande . 2 . 1 3 .
Saguache . 2 . . 2 .
Sedgwick . 13 . . 13 .
Summit . 3 . . 3 .
Washington . 9 1 . 10 .
Weld . 284 78 40 402 7
Yuma . 16 1 . 17 .
COLORADO . 2325 388 234 2947 66

Counties not listed have no verified human cases of WNV
 

 


Clinical Diagnosis Associated with Human West Nile Virus Infections: Colorado, 2003

  % of cases
TYPE of WEST NILE INFECTION 78.9
Fever
Meningitis 13.2
Encephalitis 7.9
Total 100.0

 
 
 

 


Cases of West Nile Virus by Age Group & Gender: Colorado, 2003

  GENDER Total
Male Female 9
AGE GROUP 23 10 0 33
0-9
10-19 91 66 0 157
20-29 143 151 0 294
30-39 204 240 0 444
40-49 350 393 1 744
50-59 303 295 0 598
60-69 161 151 0 312
70-79 119 131 0 250
80+ 46 69 0 115
Total 1440 1506 1 2947

 

 


Analysis of West Nile Virus Cases by Age

  Age
N Mean Median Min Max
TYPE of WEST NILE INFECTION 2325 45.9 46.0 0 94
Fever
Meningitis 388 46.8 46.0 1 95
Encephalitis 234 61.3 63.0 12 90
Overall 2947 47.2 47.0 0 95

The Mean or Average is the sum of all ages, divided by the total number cases
The Median is the AGE in which half the cases are higher in AGE and half the cases are lower in AGE
An age of 0 represents a child less than 1 year of age