Molecular weight in kD Antigen Meaning for diagnosis Antibody reactions
p100/p83 (p83 is degradation product of p100) +++ Typically positive in late stages, but early antibody reaction possible
p58   + Often in stage 3
p43/p45   + Mostly in stage 3
p41 Flagellin + Very early reactive, cross reactions with some antigen preparations
p39 BmpA (Borrelial membrane protein A) +++ Rather specific for late IgG-response; sometimes also early
p31 OspA (Outer surface protein A) ++ Late response
p30   + Not clearly defined
p22/p25 OspC +++ Very early seen; mostly the first specific reaction of the early IgM response; species specific, especially the IgG response
p21 OspC-Homolog ++ Early stage
p19 OspE + Not clearly defined
p18 Dbp (A) Decorin binding protein A ++ Surface protein, species specific response
p17 Osp17 + Not B. burgdorferi sensu strictu and B. garinii
p14 internal protein + Mostly in early infection
VlsE VlsE=vmp (variable major protein) like sequence expressed, surface lipoprotein   IgG in early and late infection, intra thecal IgM response in neuroborreliosis
Table 3: Antibody response to specific antigens used in immuoassays.