Antibacterial effect of crude water-soluble arrowroot (Puerariae radix) tea extracts on food-borne pathogens in liquid medium

Letters in Applied Microbiology
S Kim, D Y C Fung

Abstract

To evaluate the effect of crude water-soluble arrowroot tea extracts on microbial growth of food-borne pathogens in liquid medium and to confirm the damage to bacterial cells using Transmission Electronic Microscopy (TEM). Inhibition of growth of Escherichia coli O157:H7, Salmonella enterica serovar Enteritidis, Listeria monocytogenes and Staphylococcus aureus was investigated using Brain Heart Infusion (BHI) broth containing 0 (control), 0.63, 1.25, 2.5 and 5.0% (w/v) arrowroot tea. Bacterial cell counts were performed on specific selective agar on days 0, 1, 3 and 5. BHI containing 5.0% arrowroot tea extract showed a 6-7 log suppression of growth for all test strains on days 3 and 5, compared with the control. Even 0.63% arrowroot tea effectively inhibited microbial growth of all test strains on day 5. TEM images of the samples treated with 5.0% arrowroot tea revealed the rupture of cell walls and nonhomogeneous disposition of cytoplasmic materials within treated bacteria. Crude water-soluble arrowroot tea extract strongly inhibited microbial growth of all test pathogens in liquid medium. Water-soluble arrowroot tea extract has the potential to be used directly on foods or as a spray on the surfaces of food handling and proce...Continue Reading

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Citations

May 25, 2012·Applied Microbiology and Biotechnology·Rabin Gyawali, Salam A Ibrahim
May 1, 2007·Pakistan Journal of Biological Sciences : PJBS·N Hosseini JazaniM Zartoshti
May 1, 2007·Pakistan Journal of Biological Sciences : PJBS·N Hosseini JazaniA Abdi Ali
May 23, 2014·Journal of Dietary Supplements·Catherine UlbrichtRegina C Windsor
Jan 7, 2010·International Journal of Food Microbiology·Rajkumar PylaYean-Sung Jung
Oct 25, 2016·Materials Science & Engineering. C, Materials for Biological Applications·Chin-San Wu, Hsin-Tzu Liao
Mar 31, 2012·International Journal of Food Microbiology·Pradeep Singh Negi
Nov 7, 2019·Antibiotics·Emiliano J QuintoMaría P Redondo-Del-Río

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