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Electrochemical Immunodetection of Bacillus anthracis Spores
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Electrochemical Immunodetection of Bacillus anthracis Spores
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Journal Article
Electrochemical Immunodetection of Bacillus anthracis Spores
2025
Overview
The Centers for Disease Control and Prevention (CDC) classifies Bacillus anthracis as one of the most dangerous pathogens that may affect public health and national security. Due to its importance as a potential biological weapon, this bacteria has been classified in the highest category A, together with such pathogens as variola virus or botulinum neurotoxin. Characteristic features of this pathogen that increase its military importance are the ease of its cultivation, transport, and storage and its ability to create survival forms that are extremely resistant to environmental conditions. However, beyond bioterrorism, B. anthracis is also a naturally occurring pathogen. Anthrax outbreaks occur in livestock and wildlife, particularly in spore-contaminated regions of Africa, Asia, and North America. Spores persist for decades, leading to recurrent infections and zoonotic transmission through direct contact, inhalation, or consumption of contaminated meat. This work presents a new electrochemical method for detecting and quantifying B. anthracis in spore form using a selective immune reaction. The developed method is based on the thiol-modified electrodes that constitute the sensing element of the electrochemical system. Tests with the B. anthracis spore suspension showed that the detection limit for this pathogen is as low as 103 CFU/mL. Furthermore, it was possible to quantify the analyte with a sensitivity of 11 mV/log (CFU/mL). Due to several features, such as low unit cost, portability, and minimal apparatus demands, this method can be easily implemented in field analyzers for this pathogen and provides an alternative to currently used techniques and devices.
Publisher
MDPI AG
Subject
/ Antigens
/ Bacillus anthracis - immunology
/ Bacillus anthracis - isolation & purification
/ Bacillus anthracis - pathogenicity
/ Bacillus anthracis spore detection
/ Bacteria
/ Biosensing Techniques - methods
/ Electrochemical Techniques - methods
/ Enzyme-linked immunosorbent assay
/ Gold
/ immunoelectrochemical detection
/ Sensors
/ Spores, Bacterial - immunology
/ Spores, Bacterial - isolation & purification
/ Spores, Bacterial - pathogenicity
/ Thiols
