A Novel Point-of-Care Rapid Diagnostic Test for Screening Individuals for Antibody Deficiencies

被引:3
作者
Israeli, Shirli [1 ]
Golden, Allison [1 ]
Atalig, Melissa [1 ]
Mekki, Najla [2 ]
Rais, Afef [2 ]
Storey, Helen [1 ]
Barbouche, Mohamed-Ridha [2 ,3 ]
Peck, Roger [1 ]
机构
[1] PATH, Diagnost, Seattle, WA 98121 USA
[2] Pasteur Inst Tunis, Dept Immunol, Tunis, Tunisia
[3] Univ Tunis El Manar, Tunis, Tunisia
基金
比尔及梅琳达.盖茨基金会;
关键词
Point of care; Primary antibody deficiency; Primary immunodeficiency disease; Rapid diagnostic test; Screening; Vaccine-derived poliovirus; IMMUNODEFICIENCY; IGG;
D O I
10.1007/s10875-021-01179-0
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Purpose No rapid diagnostic test exists to screen individuals for primary antibody deficiencies (PAD) at or near the point of care. In settings at risk for polio where live oral polio vaccine is utilized, undiagnosed PAD patients and cases with delayed diagnosis constitute a potential reservoir for neurovirulent polioviruses, undermining polio eradication. This research aimed to develop a rapid screening test suited for use in resource-limited settings to identify individuals with low immunoglobulin G (IgG) levels, enabling early diagnosis and appropriate treatment. Methods Three prototype tests distinguishing low and normal IgG levels were evaluated with a blinded panel of serum/ plasma specimens from 32 healthy controls and 86 primary immunodeficiency-confirmed patients with agammaglobulinemia, common variable immunodeficiency, and hyper-IgM syndrome, including 57 not receiving IgG therapy. Prototype tests were compared to laboratory reference and clinical case definition. Results The leading prototype correctly identified 32 of 32 healthy controls. Among primary antibody deficiency patients not receiving IgG treatment, 17 of 19 agammaglobulinemia, 7 of 24 common variable immunodeficiency, and 5 of 14 hyper-IgM were correctly identified by the prototype, with 67% agreement with the reference assay. Conclusion The Rapid IgG Screen (RIgGS) test can differentiate between low IgG levels associated with agammaglobulinemia and normal IgG antibody levels. Differentiating CVID and hyper IgM was challenging due to the wide range in IgG levels and influence of high IgM. This test can facilitate the identification of patients with primary antibody deficiencies and support polio surveillance initiatives.
引用
收藏
页码:394 / 403
页数:10
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