ArticleMikrochimica acta2026
Rapid detection of probiotics in aquaculture using a fluorescent ligand sensor based on a Zr-MOF@Methylene blue composite.
Article in Mikrochimica acta, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
We constructed a novel fluorescent aptasensor based on Zr-MOF@MB composite material for rapid and highly sensitive detection of probiotics Bacillus subtilis and Lactobacillus acidophilus in shrimp aquaculture. The sensor utilizes a zirconium-based metal–organic framework to load the signal molecule methylene blue (MB) and immobilizes specific aptamers via Zr–O–P bonds to form a gating structure. In the presence of the target bacteria, a conformational change in the aptamer triggers the release of MB, leading to a decrease in fluorescence intensity, thereby enabling quantitative determination of the bacteria. The method completes detection within 30 min, with a linear range of 10¹ to 10⁷ CFU/mL and detection limit of 7 CFU/mL for B. subtilis and 10 CFU/mL for L. acidophilus. The developed sensor is simple to operate and highly sensitive, providing a reliable tool for effective monitoring of probiotics in shrimp aquaculture and offering new insights for the development of aptamer-based sensors for microbial detection in complex matrices.
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