Post

Tick Surveillance Update for April 2019

During April, laboratory staff shifted focus from collecting adult stage to nymphal stage Ixodes pacificus (western black-legged) ticks. Tick nymphs are more difficult to collect than adults because they don’t quest on vegetation along trails. Instead, they are found on tree stumps, downed longs, rocks, and in leaf litter. Nymphal ticks are considered more dangerous than adult ticks because they are harder to see and remove, and in some regions of California they have been found to be more likely than adults to carry Borrelia burgdorferi bacteria, which causes Lyme disease. Areas that were surveyed in April were: Rancho Corral de Tierra National Recreation Area near Half Moon Bay, Edgewood Park in Redwood City and Costanoa, south of Pescadero.  The ticks will be tested for Borrelia burgdorferi, Borrelia miyamotoi and Anaplasma pgagocytophilum. Results are not yet available.

 

Tick Collections 2018-2019 Winter Season, YTD

Park

Nearest City/Town

Number of Ix. pacificus

Half Moon Bay Coastal Trail

Half Moon Bay

1

Montara Mountain

Montara

216

Memorial Park

Loma Mar

44

Frontierland Park

Pacifica

6

Purisima Creek Redwoods OSP

Half Moon Bay/Woodside

240

Junipero Serra County Park

San Bruno

46

San Pedro Valley

Pacifica

449

Wavecrest OSP

Half Moon Bay

9

Coal Creek OSP

Portola Valley

358

Sweeney Ridge National Recreation Area

San Bruno

15

Año Nuevo State Park

Pescadero

186

Hillsborough residential area

Hillsborough

159

Rancho Corral de Tierra

Half Moon Bay

17

Costanoa

Pescadero

pending

Edgwood Park

Redwood City

pending

 

Commands