Biochemical composition, morphology and antimicrobial susceptibility pattern of Corynebacterium pseudotuberculosis biofilm

Yaacob, Mohamad Fakhri and Murata, Aika and Mohamad Nor, Nurul Hidayah and Jesse, Faez Firdaus Abdullah and Raja Yahya, Mohd Fakharul Zaman (2021) Biochemical composition, morphology and antimicrobial susceptibility pattern of Corynebacterium pseudotuberculosis biofilm. Journal of King Saud University - Science, 33 (1). p. 101225. ISSN 1018-3647

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Official URL: https://doi.org/10.1016/j.jksus.2020.10.022

Abstract

Caseous lymphadenitis (CLA) is a ruminant disease caused by Corynebacterium pseudotuberculosis, a Gram-positive facultative intracellular pathogen. The present work was performed to investigate the biochemical composition, morphology and antimicrobial susceptibility pattern of C. pseudotuberculosis biofilm using Raman spectroscopy, field emission scanning electron microscopy (FESEM) and microplate biofilm assay respectively. Results showed that the 24-h-old biofilm was characterized by Raman spectral peaks at 615 cm−1 (CCC symmetric bend phenyl ring), 668 cm−1 (Valine) and 825 cm−1 (Ring breath Tyr.) whilst the 48-h-old and 72-h-old biofilms were characterized by Raman spectral peaks at 1400 cm−1 (COO– sym.), 1450 cm−1 (COO– sym.), 1581 cm−1 (Ring breath Trp.), 1650 cm−1 (COO– asym.) and 1725 cm−1 (C[dbnd]O str.). Raman spectra also revealed the biochemical heterogeneity in C. pseudotuberculosis biofilm. FESEM images clearly showed the biofilm cells which were surrounded by the extracellular matrix. Treatment with nalidixic acid, streptomycin, tetracyclin, ethylenediaminetetraacetic acid (EDTA) and dimethyl sulfoxide (DMSO) significantly (p < 0.05) inhibited the viability of C. pseudotuberculosis biofilm. The present study suggests that the biochemical composition of C. pseudotuberculosis biofilm may vary across different developmental stages. Meanwhile, nalidixic acid, streptomycin, tetracyclin, EDTA and DMSO may be useful in the treatment of CLA. © 2020 The Author(s)

Item Type: Article
Uncontrolled Keywords: Biofilm; Extracellular polymeric substances; Corynebacterium pseudotuberculosis; Caseous lymphadenitis; Raman spectroscopy; Field emission scanning electron microscopy
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 30 Apr 2021 03:40
Last Modified: 30 Apr 2021 03:40
URI: http://eprints.um.edu.my/id/eprint/25918

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