Repository of Research and Investigative Information

Repository of Research and Investigative Information

دانشگاه علوم پزشکی و خدمات بهداشتی درمانی زنجان

Enhanced sensitivity and efficiency of detection of Staphylococcus aureus based on modified magnetic nanoparticles by photometric systems.

(2020) Enhanced sensitivity and efficiency of detection of Staphylococcus aureus based on modified magnetic nanoparticles by photometric systems. Artificial cells, nanomedicine, and biotechnology. pp. 810-817. ISSN 2169-141X (Electronic)

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Official URL: https://europepmc.org/article/med/32476515

Abstract

Staphylococcus aureus is an important infectious factor in the food industry and hospital infections. Many methods are used for detecting bacteria but they are mostly time-consuming, poorly sensitive. In this study, a nano-biosensor based on iron nanoparticles (MNPs) was designed to detect S. aureus. MNPs were synthesized and conjugated to Biosensors. Then S. aureus was lysed and nano-biosensor (MNP-TiO(2)-AP-SMCC-Biosensors) was added to the lysed bacteria. After bonding the bacterial genome to the nano-biosensor, MNPs were separated by a magnet. Bacterial DNA was released from the surface of nano-biosensor and researched by Nano-drop spectrophotometry. The results of SEM and DLS revealed that the size of MNPs was 20-25�nm which increased to 38-43�nm after modification and addition of biosensors. The designed nano-biosensor was highly sensitive and specific for the detection of S. aureus. The limit of detection (LOD) was determined as 230 CFU mL(-1). There was an acceptable linear correlation between bacterial concentration and absorption at 3.7���10(2)-3.7� 10(7) whose linear diagram and regression was Y�=�0.242X�+�2.08 and R(2) = .996. Further, in the presence of other bacteria as a negative control, it was absolutely specific. The sensitivity of the designed nano-biosensor was investigated and compared through PCR.

Item Type: Article
Keywords: WORDS Nano-biosensors; MNPs; Staphylococcus aureus; detection; nanoparticles
Divisions: Education Vice-Chancellor Department > Faculty of Medicine > Department of Basic Science > Department of Clinical Biochemistry
Page Range: pp. 810-817
Journal or Publication Title: Artificial cells, nanomedicine, and biotechnology
Abstract and Indexing: ISI, Pubmed, Scopus
Quartile : Q1
Volume: 48
Number: 1
Publisher: Taylor & Francis
Identification Number: https://doi.org/10.1080/21691401.2020.1748638
ISSN: 2169-141X (Electronic)
Depositing User: خانم فائزه مظفری
URI: http://repository.zums.ac.ir/id/eprint/6934

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