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J Clin Immunol ; 41(2): 382-392, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33206257

RESUMO

BACKGROUND: Patients with an IgG subclass deficiency (IgSD) ± specific polysaccharide antibody deficiency (SPAD) often present with recurrent infections. Previous retrospective studies have shown that prophylactic antibiotics (PA) and immunoglobulin replacement therapy (IRT) can both be effective in preventing these infections; however, this has not been confirmed in a prospective study. OBJECTIVE: To compare the efficacy of PA and IRT in a randomized crossover trial. METHODS: A total of 64 patients (55 adults and 9 children) were randomized (2:2) between two treatment arms. Treatment arm A began with 12 months of PA, and treatment arm B began with 12 months of IRT. After a 3-month bridging period with cotrimoxazole, the treatment was switched to 12 months of IRT and PA, respectively. The efficacy (measured by the incidence of infections) and proportion of related adverse events in the two arms were compared. RESULTS: The overall efficacy of the two regimens did not differ (p = 0.58, two-sided Wilcoxon signed-rank test). A smaller proportion of patients suffered a related adverse event while using PA (26.8% vs. 60.3%, p < 0.0003, chi-squared test). Patients with persistent infections while using PA suffered fewer infections per year after switching to IRT (2.63 vs. 0.64, p < 0.01). CONCLUSION: We found comparable efficacy of IRT and PA in patients with IgSD ± SPAD. Patients with persistent infections during treatment with PA had less infections after switching to IRT. CLINICAL IMPLICATION: Given the costs and associated side-effects of IRT, it should be reserved for patients with persistent infections despite treatment with PA.


Assuntos
Antibioticoprofilaxia/métodos , Imunoglobulina G/imunologia , Síndromes de Imunodeficiência/imunologia , Doenças da Imunodeficiência Primária/imunologia , Doenças da Imunodeficiência Primária/terapia , Criança , Feminino , Humanos , Deficiência de IgG/imunologia , Masculino , Pessoa de Meia-Idade , Infecção Persistente/imunologia
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