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Volume 10, Number 8—August 2004

Research

West Nile Virus in California

William Reisen*Comments to Author , Hugh Lothrop*, Robert Chiles*, Minoo Madon†, Cynthia Cossen‡, Leslie Woods*, Stan Husted‡, Vicki Kramer‡, and John Edman*
Author affiliations: *University of California, Davis, California, USA; †Greater Los Angeles County Mosquito and Vector Control District, Santa Fe Springs, California, USA; ‡California Department of Health Services, Sacramento, California, USA

Main Article

Table 1

Surveillance data for southern West Nile virus foci and the rest of California, January 1–November 1, 2003a

Surveillance data Research areas
Remaining agencies Total
Imperial Coachella LA
Human cases
1
0
0
1
2
Horse cases
0
0
0
1
1






Mosquito pools
238
1,414
1,663
6,416
9,731
Culex tarsalis
150
948
121
3,176
4,395
WNV pos
16
10
0
0
26
SLEV pos
1
3
0
0
4
WEEV pos
0
0
0
1
1
Cx. pipiens complex
0
299
1,036
1,170
2,505
WNV pos
0
0
6
0
6
Othersb
88
167
506
2,070
2,831






Sentinel chickens
6
10
5
191
212
WNV pos
51
18
0
0
69
SLEV pos
3
2
0
8
13
WEEV pos
0
0
0
0
0
Dead birds reported
23
15
1,218
6,294
7,550
Tested
6
5
256
1,118
1,385
WNV pos
0
0
38
21
59
Wild bird sera
0
3,178
1,452
4,502
9,132
WNV pos

51
0
0
51
WEEV pos 2 0 0 2

aLA, Los Angeles; WNV, West Nile virus; SLEV, St. Louis encephalitis virus; WEEV, western equine encephalitis virus; pos, positive.
bOther mosquitoes tested: Anopheles franciscanus, An. hermsi, Ae. vexans, Culiseta inornata, Cs. incidens, Cx. erythrothorax, Cx. erraticus, Cx. stigmatosoma, Oc. sierrensis, Oc. dorsalis, Oc. melanimon, Oc. taeniorhynchus, Psorophora columbiae.

Main Article

1Procedures for the bleeding and husbandry of sentinel chickens were described in Protocol 9608 approved by the University of California, Davis, Animal Use and Care Administrative Advisory Committee.

2The collection, banding, and bleeding of wild birds were conducted under Protocol 9605 approved by the Animal Use and Care Administrative Advisory Committee of the University of California, Davis, California Resident Scientific Collection Permit 801049-02 by the State of California Department of Fish and Game, and Master Station Federal Bird Marking and Salvage Permit 22763 from the U.S. Geological Survey Bird Banding Laboratory.

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