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Tick Surveillance Update
March 2018

During March, laboratory staff continued winter surveillance for adult Ixodes pacificus (Western black-legged ticks). Ticks are collected by dragging a 1 meter square piece of white flannel over the vegetation alongside trails. Laboratory staff have begun testing collected Ixodes pacificus ticks for the presence of bacteria Borrelia burgdorferi, Borrelia miyamotoi and Anaplasma phagocytophilum. Parks that were surveyed in March were Año Nuevo and Memorial Park near Pescadero, and Big Canyon Park and Eaton Park in San Carlos. Adult tick collections are completed for the 2017-2018 winter season. Nymphal tick surveillance is planned for spring.

 

Tick Collections 2017-2018 Winter Season

Park

Nearest City/Town

Number of Ix. pacificus

Montara Mountain

Montara

124

Wunderlich County Park

Woodside

241

Crystal Springs Regional Trail

Millbrae

243

Purisima Creek Redwoods OSP

Half Moon Bay

234

Skyline Ridge OSP

Portola Valley

483

Coal Creek OSP

Portola Valley

229

Los Trancos OSP

Portola Valley

225

Thornewood OSP

Portola Valley

211

Memorial County Park

Pescadero

145

Water Dog Lake Park

Belmont

293

Big Canyon Park

San Carlos

200

Eaton Park

San Carlos

393

Ano Nuevo State Park

Pescadero

211

Laurelwood Park

San Mateo

304

Commands