. "B CATALOG OF EMERGING INFECTIOUS DISEASE AGENTS." Emerging Infections: Microbial Threats to Health in the United States. Washington, DC: The National Academies Press, 1992.
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Emerging Infections: Microbial Threats to Health in the United States
INFECTIOUS AGENT
California serogroup viruses: LaCrosse, Jamestown Canyon, California encephalitis, and snowshoe hare virus
MODE OF TRANSMISSION
bite of an infective mosquito
not directly transmitted from person to person
DISTRIBUTION
United States, Canada, and Commonwealth of Independent States
cases typically occur in temperate latitudes in summer and early fall
INCUBATION PERIOD
usually 5 to 15 days
TREATMENT
supportive only
PREVENTION AND CONTROL
avoidance of exposure to mosquitoes during hours of biting (dusk to dawn)
mosquito control (elimination of breeding sites)
FACTORS FACILITATING EMERGENCE
reforestation
poor vector control
increasing interface between human activity and endemic areas
discarded tires as a source of mosquito breeding sites
