Tick Testing Results
2015-2016 water year, San Mateo County

Tick testing is completed for the 2015-2016 season.  Staff flagged for ticks at fifteen parks this season, although only 10 parks had sufficient numbers for estimating infection prevalence.  Ticks were tested for the presence of two disease-causing bacteria, Borrelia burgdorferi which causes Lyme Disease and Borrelia miyamotoi which causes a relapsing fever type illness.  As seen in the table below, infection prevalence of either of the two Borrelia ranged from 2.6% to 0%, and was highest at Thornewood Open Space Preserve near Woodside.

Parks where tick abundance was low and insufficient numbers of ticks were collected to estimate infection prevalence were San Pedro Valley Park in Pacifica, Junipero Serra Park in San Bruno and Frontierland Park in Pacifica.  San Bruno Mountain and Quarry Park in El Granada were also flagged for ticks but no Ixodes pacificus ticks were found.