Journal
FOOD CONTROL
Volume 42, Issue -, Pages 23-28Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2014.01.030
Keywords
Antimicrobial action; Algae; Listeria monocytogenes; Cytoplasmic membrane damage; ATP leakage; TEM
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The ethanol extract of Myagropsis myagroides had antimicrobial activity against Gram-positive bacteria. The extract was fractionated through liquid-liquid extraction; the chloroform fraction had strong antimicrobial activity against Listeria monocytogenes (minimum inhibitory concentration (MIC) 0.063 mg/mL), and Clostridium perfringens (MIC 0.031 mg/mL). The chloroform fraction was separated into 22 sub-fractions using silica gel column chromatography, with the fourth fraction (CH4) possessing the strongest antimicrobial activity against Gram-positive bacteria. Leakage of 260 nm-absorbing material and ATP was observed in CH4-treated cells and morphological alterations were observed by electron microscopy. These results indicate that the cytoplasmic membrane may be a target of the CH4 fraction. (C) 2014 Elsevier Ltd. All rights reserved.
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