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The County plans to conduct ultra-low volume, truck-mounted, pesticide spray treatments in the Rolando area this week to protect the public by reducing mosquito populations to keep them from potentially spreading West Nile virus.
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Mosquitoes collected in routine monitoring in a mid-city region of San Diego have tested positive for West Nile virus—prompting County environmental health officials to remind people to protect themselves from mosquitoes that can transmit the virus.
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Two dead crows recently collected in routine monitoring from Lemon Grove tested positive for West Nile virus, prompting County environmental health officials to remind people to protect themselves from mosquitoes that can transmit the virus to people.
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San Diego County’s Vector Control Program is scheduled to conduct its first routine aerial larvicide drops of the year next week on up to 52 local waterways to help stop mosquitoes from potentially spreading diseases like West Nile virus.
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A deer mouse collected on Jan. 3, 2025, in Cuyamaca Rancho State Park, has tested positive for the potentially deadly hantavirus.
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The County is investigating the first ever case of locally acquired dengue. The Escondido resident who became sick with dengue did not travel to an area where the mosquito transmitted illness is common. No additional locally acquired cases have been identified at this time.
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Two mice collected from a campground trail at San Onofre State Beach as part of ongoing surveillance to protect public health have tested positive for the potentially deadly hantavirus. County Vector Control team is working with campground officials to notify campground visitors and staff.
