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Clinical and Serologic Response to the 23-valent Polysaccharide Pneumococcal Vaccine in Children and Teens with Recurrent Upper Respiratory Tract Infections and Selective Antibody Deficiency

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We report the clinical and serological response of 72 children and adolescents after immunization with the 23-valent polysaccharide pneumococcal vaccine (PPV23). All had been diagnosed with recurrent upper respiratory tract infections and low antipneumococcal immunity. Forty-five (62%) of these patients had received PCV7, the 7-serotype pneumococcal conjugated vaccine (Prevnar7). After immunization with the polysaccharide vaccine, 69 (96%) patients, including 42 of the 45 who had previously been immunized with the conjugate vaccine, had a positive clinical response including 12 patients (17%) whose serological response to the polysaccharide vaccine was inadequate. Clinical and serological response to PPV23 was assessed at approximately 1, 3 and 6 months after immunization. Our study also confirmed that a small group of patients with recurrent upper respiratory tract infections are unable to develop a normal response to pneumococcal and other bacterial polysaccharides despite vaccination with the newer conjugated vaccines. This immunodeficiency has been named selective antibody deficiency with normal immunoglobulins or impaired polysaccharide responsiveness. These patients did well after administration of intravenous IgG.
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Keywords: 23-valent pneumococcal vaccine; children; recurrent upper respiratory tract infections; teens

Document Type: Research Article

Publication date: February 1, 2016

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