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Human immunodeficiency virus (HIV)-infected persons are less likely than are noninfected persons to respond to vaccination with pneumococcal polysaccharides (PPS). Among those who respond, however, similar IgG levels may be achieved. HIV-infected men immunized with pneumococcal vaccine were classified as high- or low-level responders (IgG &gt; or = 1 microgram/mL for &gt; or = 3 of 5 PPS [high] or for &lt; or = 1 PPS [low]). One and 2 years after immunization, geometric mean IgG levels and the percentages of subjects with IgG levels &gt; or = 1 microgram/mL were similar for HIV-infected and for healthy high-level responders (controls) for all PPS except for serotype 8. Among HIV-infected low-level responders, revaccination with a double dose of pneumococcal vaccine did not stimulate IgG responses. Responsiveness of HIV-infected white patients was significantly associated with the Km(1)- negative allotype. These findings support current general recommended guidelines for administering pneumococcal vaccine to HIV-infected persons. Nonresponders will not benefit from revaccination.

the journal of infectious diseases (online. university of chicago press)/the journal of infectious diseases

IgG Antibody to Pneumococcal Capsular Polysaccharide in Human Immunodeficiency Virus-Infected Subjects: Persistence of Antibody in Responders, Revaccination in Nonresponders, and Relationship of Immunoglobulin Allotype to Response