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A rapid and ultrasensitive paper sensor for Bacillus cereus Haemolysin BL detection
Analyst ( IF 3.6 ) Pub Date : 2024-08-15 , DOI: 10.1039/d4an00813h
Chunhao Wei 1 , Xinxin Xu 1 , Lingling Guo 1 , Aihua Qu 1 , Aihong Wu 1 , Chuanlai Xu 1 , Hua Kuang 1
Affiliation  

Bacillus cereus is a foodborne opportunistic pathogen commonly found in humans and animals. It produces various toxins, causing frequent food safety incidents. Therefore, establishing a fast and accurate method for detecting B. cereus enterotoxin is crucial for disease diagnosis and food safety. In this study, Haemolysin BL comprising Hbl B and L2 was obtained from a prokaryotic expression system and then used to immunize mice for antibody preparation. Paired antibodies 2A10–5C7 against Hbl B and 1E2–10A4 against Hbl L2 were screened using the chessboard method and then used to construct a double-antibody sandwich detection method and a lateral flow immunochromatographic assay (LFIA) to quantify the concentrations of Hbl B and L2 in PBS and milk. The limits of detection for Hbl B and L2 in milk were 0.74 ng mL−1 and 1 ng mL−1 with detection ranges of 1.48–645.5 ng mL−1 and 2.33–391.5 ng mL−1. The spiked recoveries ranged from 82.2% to 105.67% and there was no cross-reactivity with common microbial toxins. The established LFIA was low in cost and rapid and was comparable with commercially available detection kits for food samples.

中文翻译:


一种用于蜡样芽孢杆菌溶血素 BL 检测的快速超灵敏纸张传感器



蜡样芽孢杆菌是一种常见于人类和动物的食源性机会性病原体。它产生各种毒素,导致食品安全事故频发。因此,建立一种快速准确的蜡样芽孢杆菌肠毒素检测方法对于疾病诊断和食品安全至关重要。在本研究中,从原核表达系统获得包含 Hbl B 和 L2 的溶血素 BL,然后用于免疫小鼠以进行抗体制备。使用棋盘法筛选针对 Hbl B 的配对抗体 2A10-5C7 和针对 Hbl L2 的 1E2-10A4,然后用于构建双抗体夹心检测方法和侧流免疫层析测定 (LFIA) 以量化 PBS 和牛奶中 Hbl B 和 L2 的浓度。牛奶中 Hbl B 和 L2 的检测限为 0.74 ng mL-1 和 1 ng mL-1,检测范围为 1.48-645.5 ng mL-1 和 2.33-391.5 ng mL-1。加标回收率为 82.2%—105.67%,与常见微生物毒素无交叉反应性。已建立的 LFIA 成本低且快速,可与市售的食品样品检测试剂盒相媲美。
更新日期:2024-08-15
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