Isolation and characterization of an antibacterial compound Bis-(2-ethylhexyl) phthalate from the fungi Penicillium digitatum
DOI:
https://doi.org/10.51248/.v43i5.3264Keywords:
Bis-(2-ethylhexyl) Phthalate derivatives, Spectroscopic analysis,, Penicillium digitatum, Escherichia coli, Streptococcus agalactiae, Staphylococcus aureus, antibiotic resistanceAbstract
Introduction and Aim: Penicillium is a fungal antibiotic derived from Penicillium notatum. In this study, we aimed to isolate the antibacterial compound Bis-(2-ethylhexyl) phthalate from the fungi Penicillium digitatum, as well as study its antibacterial activity against the the pathogens Escherichia coli,Group B Streptococcus agalactiae, and Staphylococcus aureus.
Materials and Methods: The identification of Bis-(2-ethylhexyl) phthalate-containing secondary metabolite was achieved through bioassay-guided chemical analysis of the crude extract. The structure of the compound was identified from UV spectra, IR, and GC-MS spectral data. The antimicrobial activity of Bis-(2-ethylhexyl) phthalate, isolated from the fungus Penicillium digitatum, was determined using standard methods.
Results: UV, IR, and GC-MS spectroscopy confirmed the crude extract of fungi Penicillium digitatum to contain the bioactive compounds 1,2-benzenedicarboxylic acid and bis(ethylhexyl) phthalate. The MIC value of the bioactive molecule was also determined to be 32 mg/ml. The P. digitatum ethyl acetate extract showed moderate antibacterial activity against the Gram-negative bacterial isolate Escherichia coli and high activity against the Gram positive pathogens Streptococcus agalactiae and Staphylococcus aureus.
Conclusion: The fungi Penicillium digitatum produces the metabolite Bis-(2-ethylhexyl) phthalate, which exhibits antibacterial activity against Gram positive and Gram-negative pathogens and hence could be used in treating infections by these bacterial pathogens.
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