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Hou K, Zhao P, Chen Y, Li G, Lin Y, Chen D, Zhu D, Wu Z, Lian D, Huang X, Li J. Rapid Detection of Bifidobacterium bifidum in Feces Sample by Highly Sensitive Quartz Crystal Microbalance Immunosensor. Front Chem 2020; 8:548. [PMID: 32733849 PMCID: PMC7358898 DOI: 10.3389/fchem.2020.00548] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 05/27/2020] [Indexed: 02/05/2023] Open
Abstract
In this work, a quartz crystal microbalance (QCM) sensor has been fabricated using immunoassay for sensitive determination of Bifidobacterium bifidum. Au nanoparticle has been used for amplifying sandwich assays. The proposed immunosensor exhibited a linear detection range between 103 and 105 CFU/mL with a limit of detection of 2.1 × 102 CFU/mL. The proposed immunosensor exhibited good selectivity for B. bifidum sensing with low cross reactivity for other foodborne pathogens such as Lactobacillus acidophilus, Listeria monocytogenes, and Escherichia coli. In addition, the proposed immunosensor has been successfully used for B. bifidum detection in feces samples and food samples. The frequency decreases of 12, 17, and 10 Hz were observed from the milk samples consisting of the mixtures of L. acidophilus, L. monocytogenes, and E. coli. The frequency decreases of 8, 15, and 7 Hz were observed from the feces samples consisting of the mixtures of L. acidophilus, L. monocytogenes, and E. coli.
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Affiliation(s)
- Kaijian Hou
- Department of Endocrine and Metabolic Diseases, Longhu Hospital, The First Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Pingsen Zhao
- Department of Laboratory Medicine, Yuebei People's Hospital, Shantou University Medical College, Shaoguan, China
| | - Yongru Chen
- Department of Emergency Intensive Care Unit (EICU), The First Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Guiping Li
- Department of Endocrine and Metabolic Diseases, The Third People's Hospital of Huizhou, Huizhou, China
| | - Yu Lin
- Department of Endocrinology, Jieyang People's Hospital, Jieyang, China
| | - Danjie Chen
- Department of Endocrinology, Puning People's Hospital, Puning, China
| | - Dan Zhu
- Department of Endocrine and Metabolic Diseases, Longhu Hospital, The First Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Zezhen Wu
- Department of Endocrine and Metabolic Diseases, Longhu Hospital, The First Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Danchun Lian
- Department of Cardiology, The Second Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Xiaojun Huang
- Department of Cardiology, The Second Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Jilin Li
- Department of Cardiology, The Second Affiliated Hospital of Shantou University Medical College, Shantou, China
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