TABLE 4.

Relationship between anti-Ixodes calreticulin antibody in 234 Block Island residents and a history of tick bite within the previous year, tick-associated itch, and concurrent antibody against B. burgdorferi and B. microti

Indicator of tick exposureNo. of subjects with antibody status/no. with indicatorP value
Anti-Ixodes calreticulin antibodyNo anti-Ixodes calreticulin antibody
Report of tick bite2/1148/2001.000
Report of tick-associated itch1/1447/2140.311
B. burgdorferi antibody (total)8/1464/2200.029
B. microti antibody
    IgM5/1413/2200.002
    IgG5/140/220<0.001