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Tick Surveillance for Water Year 2021-2022

Laboratory staff began winter surveillance for adult Ixodes pacificus (Western black-legged ticks) in December. Ticks are collected by dragging a one-meter square sheet of white flannel over the vegetation alongside trails, using a technique called “flagging.” Ixodes pacificus ticks will be tested for the presence of bacteria Borrelia burgdorferi, the causative agent of Lyme disease, as well as other disease causing bacteria, Borrelia miyamotoi and Anaplasma phagocytophilum. Parks that were surveyed in December were Edgewood Park in Redwood City and Windy Hill Open Space Preserve near Portola Valley. Adult Ixodes pacificus collections will continue through the winter.

Tick Collections from parks and neighborhoods 2021-2022 Winter Season, YTD

 ParkNearest City/TownNumber of Ix. pacificus
Edgewood Park Redwood City105
Windy Hill Open Space PreservePortola Valley18



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