Chẩn đoán huyết thanh virus Zika (ZIKV) bằng phương pháp ELISA mới dựa trên NS1 không có sự phản ứng chéo với kháng thể virus dengue: một nghiên cứu đa nhóm về hiệu suất xét nghiệm, 2015 đến 2016

Eurosurveillance - Tập 21 Số 50 - 2016
Katja Steinhagen1, Christian Probst1, Christiane Radzimski1, Jonas Schmidt‐Chanasit2,3, Petra Emmerich3, Marjan Van Esbroeck4, Janke Schinkel5, Martin P. Grobusch6,7, Abraham Goorhuis6, Jens M. Warnecke1, Erik Lattwein1, Lars Komorowski1, Andrea Deerberg1, Sandra Saschenbrecker1, W. Stöcker1, W Schlumberger1
1Institute for Experimental Immunology, EUROIMMUN AG, Lübeck, Germany
2German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel, Hamburg, Germany
3WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research, Bernhard-Nocht Institute for Tropical Medicine, Hamburg, Germany
4National Reference Center for Arboviruses, Department of Clinical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
5Department of Medical Microbiology, Section of Clinical Virology, Academic Medical Center, Public Health Service, Amsterdam, the Netherlands
6Center for Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Division of Internal Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
7Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany

Tóm tắt

Chẩn đoán huyết thanh virus Zika (ZIKV) gặp khó khăn do sự phản ứng chéo cao giữa các flavivirus. Chúng tôi đã đánh giá hiệu suất chẩn đoán của một phương pháp ELISA chống ZIKV mới dựa trên protein phi cấu trúc 1 (NS1) tái tổ hợp của virus Zika. Độ nhạy của xét nghiệm được kiểm tra bằng cách sử dụng huyết thanh từ 27 bệnh nhân có kết quả RT-PCR xác nhận và 85 bệnh nhân nghi ngờ nhiễm ZIKV. Tính đặc hiệu được phân tích bằng cách sử dụng huyết thanh từ 1.015 cá nhân khỏe mạnh. Mẫu từ 252 bệnh nhân nhiễm virus dengue (n = 93), virus Tây Nile (n = 34), virus viêm não Nhật Bản (n = 25), virus chikungunya (n = 19) hoặc Plasmodium spp. (n = 69) và từ 12 cá nhân đã tiêm vaccine sốt vàng cũng được kiểm tra. Trong các mẫu ZIKV xác nhận được thu thập trong vòng ≥ 6 ngày sau khi khởi phát triệu chứng, độ nhạy của ELISA là 58.8% (khoảng tin cậy (CI): 36.0–78.4) cho IgM, 88.2% (95% CI: 64.4–98.0) cho IgG, và 100% (95% CI: 78.4–100) cho IgM/IgG, với độ đặc hiệu 99.8% (95% CI: 99.2–100). Không phát hiện sự phản ứng chéo với kháng thể virus dengue ở mức cao. Trong số các bệnh nhân có khả năng có kháng thể phản ứng chéo, tỷ lệ dương tính với chống ZIKV lần lượt là 0.8% (95% CI: 0–3.0) và 0.4% (95% CI: 0–2.4) cho IgM và IgG. Cung cấp độ đặc hiệu cao và phản ứng chéo thấp, ELISA dựa trên NS1 có tiềm năng hỗ trợ trong việc tư vấn cho bệnh nhân, phụ nữ mang thai và khách du lịch sau khi trở về từ các vùng dịch ZIKV.

Từ khóa


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