Affiliation:
1. Japan International Research Center for Agricultural Sciences, 1-1 Ohwashi, Tsukuba, Ibaraki 305-8686, Japan (ORCID: https://orcid.org/0000-0002-7084-6461 [J.M.])
2. Faculty of Agriculture, National University of Laos, Ban Paksap Mai, Xaythany District, Vientiane Capital, Laos
Abstract
ABSTRACT
Padaek is a salt-fermented freshwater fish product popularly used in Laos as a shelf-stable all-purpose seasoning. For padaek production, the fish is fermented with salt and rice bran at ambient temperature. Although it is considered edible after 2 to 3 months of fermentation, 6 to 12 months is required to enhance its palatability. Its long shelf life and abundance of free amino acids, such as glutamate and lysine, are distinctive features of the product. Although commercial products are currently available, the tradition of making and consuming padaek at home continues, particularly in rural areas, to make use of indigenous freshwater fish, which provides a continuous supply of food and nutrition. Histamine can cause foodborne intoxication. Occasionally, its excessive accumulation occurs in amino acid–containing food, such as fermented fish products, because of the growth of microorganisms with histidine decarboxylase activity. We found a negative correlation between salinity and histamine content in homemade padaek products collected from rural households. Experimental padaek fermentation with initial salinity conditions of 10 and 6.5% exhibited significant histamine accumulation after 2 weeks of incubation at 30°C and exceeded 1,000 ppm within 6 months, but no histamine was detected in fermentation with an initial salinity of 18% over the same period. This indicated that salinity was a critical factor for controlling the risk of histamine accumulation during padaek fermentation. We, therefore, created and used a simplified calculation chart to help local households adjust the initial salinity to a sufficient level to reduce histamine accumulation during padaek fermentation. This producer-friendly approach for reducing the risk of histamine accumulation in this popular fermented food in Laos should be widely implemented to enhance food safety management in the country.
HIGHLIGHTS
Publisher
International Association for Food Protection
Subject
Microbiology,Food Science
Reference19 articles.
1. Codex Alimentarius Commission.
2013. CODEX STAN 302-2011. Standard for fish sauce.Available at: http://www.codexalimentarius.net/download/standards/11796/CXS_302e.pdf. Accessed 30 June 2020.
2. European Food Safety Authority.
2011. Scientific opinion on risk-based control of biogenic amine formation in fermented foods.EFSA J.9: 2393. https://doi.org/10.2903/j.efsa.2011.2393
3. Food and Agriculture Organization of the United Nations, World Health Organization.
2012.Joint FAO/WHO expert meeting on the public health risks of histamine and other biogenic amines from fish and fishery products. Meeting Report. Food and Agriculture Organization of the United Nations, World Health Organization, Rome. Available at: http://www.fao.org/fileadmin/user_upload/agns/news_events/Histamine_Final_Report.pdf. Accessed 29 June 2020.
4. Fujii,
T.
2006. Scombroid fish poisoning.Jpn. J. Food Microbiol. 23: 61–71. (In Japanese.) https://doi.org/10.5803/jsfm.23.61
5. Garaway,
C. J.,
Photitay
C.,
Roger
K.,
Khamsivilay
L.,
and HalwartM.
2013. Biodiversity and nutrition in rice-based ecosystems; the case of Lao PDR.Hum. Ecol. 41: 547–562. https://doi.org/10.1007/s10745-013-9602-z
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