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Tick Surveillance Update

During January, 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. Ixodes pacificus ticks will be tested for the presence of bacteria Borrelia burgdorferi, Borrelia miyamotoi and Anaplasma phagocytophilum. Parks that were surveyed in January were Thornewood Open Space Preserve near Portola Valley and Memorial County Park near Pescadero. Adult tick surveillance will continue through February and March, and nymphal tick surveillance is planned for spring.

 

Tick Collections 2017-2018 Winter Season

Park

Nearest City/Town

Number of Ix. pacificus

Montara Mountain

Montara

62

Wunderlich County Park

Woodside

241

Crystal Springs Regional Trail

Millbrae

243

Purisima Creek Redwoods OSP

Half Moon Bay

144

Skyline Ridge OSP

Portola Valley

51

Coal Creek OSP

Portola Valley

53

Los Trancos OSP

Portola Valley

225

Thornewood OSP

Portola Valley

211

Memoria County Park

Pescadero

80

Commands