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 exposure	No. of subjects with antibody status/no. with indicator		P value
	Anti-Ixodes calreticulin antibody	No anti-Ixodes calreticulin antibody
Report of tick bite	2/11	48/200	1.000
Report of tick-associated itch	1/14	47/214	0.311
B. burgdorferi antibody (total)	8/14	64/220	0.029
B. microti antibody
IgM	5/14	13/220	0.002
IgG	5/14	0/220	<0.001