High prevalence of Clostridium botulinum in vegetarian sausages

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http://hdl.handle.net/10138/317886

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Pernu , N , Keto-Timonen , R , Lindström , M & Korkeala , H 2020 , ' High prevalence of Clostridium botulinum in vegetarian sausages ' , Food Microbiology , vol. 91 , 103512 . https://doi.org/10.1016/j.fm.2020.103512

Title: High prevalence of Clostridium botulinum in vegetarian sausages
Author: Pernu, Noora; Keto-Timonen, Riikka; Lindström, Miia; Korkeala, Hannu
Contributor: University of Helsinki, Food Hygiene and Environmental Health
University of Helsinki, Helsinki One Health (HOH)
University of Helsinki, Helsinki One Health (HOH)
University of Helsinki, Helsinki One Health (HOH)
Date: 2020-10
Language: eng
Number of pages: 5
Belongs to series: Food Microbiology
ISSN: 0740-0020
URI: http://hdl.handle.net/10138/317886
Abstract: Clostridium botulinum is a significant food safety concern due to its ability to produce highly potent neurotoxin and resistant endospores. Vegetarian sausages have become a popular source of plant protein and alternative for meat products. While vegetarian sausages have not been linked to botulism, numerous outbreaks due to preserved vegetables suggest a frequent occurrence of C. botulinum spores in the raw material. The product formulation of vegetarian sausages involves limited NaCl and preservatives, and shelf-lives may be several months. The safety of vegetarian sausages thus relies mainly on heat treatment and chilled storage. The main food safety concern is C. botulinum Group II that can grow and produce toxin at refrigeration temperatures. Here we show a high overall prevalence (32%) of C. botulinum in 74 samples of vegetarian sausages from seven producers. Both Groups I and II strains and genes for neurotoxin types A, B, E and F were detected in the products. The highest cell counts (1200 spores/kg) were observed for C. botulinum Group II in products with remaining shelf-lives of 6 months at the time of purchase. We conclude that vacuum-packaged vegetarian sausage products frequently contain C. botulinum spores and may possess a high risk of C. botulinum growth and toxin production. Chilled storage below 3°C and thorough reheating before consumption are warranted.
Subject: CHILLED FOODS
FOODBORNE BOTULISM
GROWTH
PCR ASSAY
PH
SODIUM-CHLORIDE
SPORES
TOXIGENESIS
TOXIN PRODUCTION
VEGETABLES
416 Food Science
11832 Microbiology and virology
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