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Title: Growth-inhibiting antibody responses of humans vaccinated with recombinant outer surface protein A or infected with Borrelia burgdorferi or both. Author: Luke CJ, Marshall MA, Zahradnik JM, Bybel M, Menefee BE, Barbour AG. Journal: J Infect Dis; 2000 Mar; 181(3):1062-8. PubMed ID: 10720532. Abstract: Serial serum samples from a 2-year human trial of outer surface protein (Osp) A vaccine were analyzed by Borrelia burgdorferi growth-inhibition assay (GIA) and anti-OspA ELISA to assess the antibody responses of vaccine recipients and subjects with Lyme disease. Although 74% of OspA recipients had a reciprocal GIA titer >/=64 after 3 vaccinations, none of the placebo recipients, even those with Lyme disease, had a GIA titer this high. The correlation between GIA and ELISA titers after 3 doses of vaccine was.84; however, more vaccine recipients had an elevated ELISA titer paired with low GIA titer than had a low ELISA titer with a high GIA titer. OspA-vaccine recipients who acquired Lyme disease had significantly lower serum GIA and ELISA titers after 3 immunizations than did age- and sex-matched OspA recipients without Lyme disease. Thus, vaccinated subjects had antibodies to native antigen on viable cells, and antibody assays with this specificity may predict protection of vaccinees against infection.[Abstract] [Full Text] [Related] [New Search]