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Table 2 Antibody titers against SFG rickettsiae in the AI positive group (a), the AI negative group (b), and the healthy blood donors (c)

From: Evidence of rickettsiae in Danish patients tested for Lyme neuroborreliosis: a retrospective study of archival samples

   Antibody index positive (n = 99)  
a. 1:64 1:128 1:256 1:512 1:1024 1:2048 1:4096
RR IgM 1 0 0 1 0 0 0
RR IgG 12 14 7 5 0 0
b.   Antibody index negative (n = 101)  
RR IgM 0 2 0 0 0 0 0
RR IgG 9 13 1 1 2 0
c.   Blood donors (n = 111/60)  
RR IgM 1 0 0 1 0 0 0
RR IgG 18 10 4 1 0 0