BƯỚC ĐẦU PHÁT TRIỂN BỘ XÉT NGHIỆM MIỄN DỊCH ĐỂ PHÁT HIỆN NHANH OCHRATOXIN A TRONG THỰC PHẨM

Tống Đức Minh1,, Nguyễn Văn Chuyên2, Nguyễn Văn ba1, Nguyễn Thị Thu Trang1, Lê Tuấn Anh1, Hoàng Thị Trường1, Vũ Thị Hoa1, Nguyễn Trọng Đạt3, Bùi Khánh Toàn4
1 Học viện Quân Y 103
2 Vietnam Military Medical University
3 Viện Y học Dự phòng Quân đội
4 Viện Vệ sinh Dịch tễ Tây Nguyên

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Tóm tắt

Aims: To determine some technical parameters of rapid test strips to detect Ochratoxin A.


Methods: Research was conducted at the Department of Military Hygiene, Military Medical Academy. We had optimized a number of test parameters including: pre-treatment of conjugate pads, antibody concentration covering the gold nanoparticles, capture antibody concentration, and running buffer. Determine the technical parameters of test strips manufactured to detect Ochratoxin A, including cross-reactivity, stability, sensitivity, specificity.


Results: Antibody concentration of 20 µg/ml covering the gold particle reached saturation state and LOD is 1 µg/ml. The capture antibody concentration was 0.75 mg/ml; Lactose 10% and sucrose 10% enhanced the release of gold particle-antibody complexes through the conjugate membrane. The test strip did not cross-react with standard samples of Aflatoxin B1, Aflatoxin M1, and Patulin at the concentrations tested. 


Conclusion: The results show that optimizing the parameters are important. Evaluation of the technical parameters of the rapid test strip for Ochratoxin A detection shows that the test strip has sensitivity and specificity at a high level.

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Tài liệu tham khảo

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