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Antimicrobial activities of organic acid vapors against Acidovorax citrulli, Salmonella enterica, Escherichia coli 0157:H7, and Listeria monocytogenes on Cucurbitaceae seeds

Authors
Shin, Hye JungKim, HoikyungBeuchat, Larry R.Ryu, Jee-Hoon
Issue Date
12월-2020
Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Keywords
Seed decontamination; Cucurbitaceae seeds; Acetic acid vapor; Propionic acid vapor; Acidovorax citrulli; Salmonella enterica; Escherichia coli O157:H7; Listeria monocytogenes
Citation
FOOD MICROBIOLOGY, v.92
Indexed
SCIE
SCOPUS
Journal Title
FOOD MICROBIOLOGY
Volume
92
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/51366
DOI
10.1016/j.fm.2020.103569
ISSN
0740-0020
Abstract
This study investigated the antimicrobial activities of organic acid vapors against a phytopathogen (Acidovorax citrulli) and foodborne pathogens (Salmonella enterica, Escherichia coli O157:H7, and Listeria monocytogenes) on the surface of Cucurbitaceae seeds. Germination percentages of cucumber, honeydew melon and watermelon seeds treated with acetic and propionic acid vapors (100 mg/L) at 50 degrees C and 43% or 85% relative humidity (RH) for up to 2 h did not significantly (P > 0.05) decrease. Treatment with formic acid significantly (P <= 0.05) decreased the germination percentage. The antimicrobial activities of acetic and propionic acid vapors (100 mg/L; 50 degrees C; 43% or 85% RH) were determined. A. citrulli was inactivated within 1 h on cucumber and watermelon seeds, regardless of type of organic acid or RH. The phytopathogen was reduced to levels below the detection limit (-0.5 log CFU/g) for enrichment on honeydew melon seeds treated with acetic acid vapor. S. enterica and L. monocytogenes were inactivated within 2 h at 85% RH on honeydew melon and watermelon seeds treated with acetic acid and propionic acid vapors. E. coli O157: H7 was inactivated by treatment with acetic acid vapor at 85% RH. This study provides useful information for developing a method to decontaminate Curcurbitaceae seeds using organic acid vapors as lethal agents.
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