Tick Surveillance, Water Year 2023-2024

A forest trail surrounded by trees with sunlight filtering through the canopy. — Oak woodlands with leaf litter are an ideal place to collect Ixodes pacificus nymphs.

Tick Collections from parks, 2023-2024 Season (November 2023 through June 2024)

During June, Laboratory staff continued collections for Western black-legged tick (Ixodes pacificus) nymphs. Peak nymphal tick season typically comes to an end in June.

Parks and neighborhoods surveyed in June include areas of the Portola Valley Ranch neighborhood in Portola Valley, Pulgas Ridge Open Space Preserve in San Carlos/Redwood City and Hidden Canyon Park in Belmont.

Additionally, a preschool in Half Moon Bay was surveyed for ticks. No Western black-legged ticks were collected at the school, but a few Dermacentor ticks were found. Dermacentor ticks are not a vector of Lyme disease.

Tick Collections from parks and neighborhoods, 2023-2023 Season (through June 2024)

Park/Neighborhood	Nearest City/Town	Number of Ix. pacificus adults	Number of Ix. pacificus nymphs
Garrett Park	Redwood City	3
Sign Hill Park	South San Francisco	0
Twin Pines Park	Belmont	0
Hillside Park	Daly City	0
Hillsborough south	Hillsborough	114
Mussel Rock	Daly City	1
Windy Hill Open Space Preserve	Portola Valley	443	101
Burleigh H. Murray Ranch	Half Moon Bay	126
Phleger Estate	Woodside	84
San Pedro Valley Park	Pacifica	100	30
Hidden Canyon	Belmont	55	74
Wunderlich Park	Woodside		70
Edgewood Park	Redwood City		187
Huddart Park	Woodside		74
Thornewood Open Space Preserve	Woodside		144
Coal Mine Ridge	Portola Valley		78
Los Trancos Open Space Preserve	Portola Valley		94
Coal Creek Open Space Preserve	Portola Valley		64
Big Canyon Park	San Carlos		67
Skyline Ridge Open Space Preserve	La Honda		68
Portola Valley Ranch	Portola Valley		62
Pulgas Ridge Open Space Preserve	Redwood City		71

Page last reviewed July 3, 2024

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