[Detection of Salmonella and Enumeration of Hygienic Indicator Bacteria in Dried Wood Ear Mushrooms].

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  • Additional Information
    • Source:
      Publisher: Food Hygienic Society Country of Publication: Japan NLM ID: 0142214 Publication Model: Print Cited Medium: Print ISSN: 0015-6426 (Print) Linking ISSN: 00156426 NLM ISO Abbreviation: Shokuhin Eiseigaku Zasshi Subsets: MEDLINE
    • Publication Information:
      Publication: Tokyo : Food Hygienic Society
      Original Publication: Tokyo, Nippon Shokuhin Eisei Gakkai.
    • Subject Terms:
      Salmonella*/isolation & purification ; Agaricales*/classification ; Food Microbiology*; Serotyping ; Bacterial Load ; Disease Outbreaks ; Salmonella Food Poisoning/prevention & control ; Salmonella Food Poisoning/microbiology ; China
    • Abstract:
      An outbreak of Salmonella Stanley in the United States associated with dried wood ear mushrooms imported from China prompted us to conduct serotyping of Salmonella isolated from dried wood ear mushrooms in voluntary testing, and quantitative test for Salmonella along with enumeration of hygienic indicator bacteria in positive samples in order to evaluate the risk of Salmonella outbreak from dried wood ear mushrooms. The major serovars of Salmonella isolates obtained from 20 samples were as follows: O3,10 group-London (n=3) and Weltevreden (n=5) etc, totaling 9 strains; O4 serogroup-Saintpaul (n=2), Stanley (n=1), Typhimurium (including monophasic variant; n=3), totaling 6 strains. O7 serogroup (Potsdam) and O8 serogroup (Newport) were one strain each. Qualitative and quantitative tests for Salmonella were conducted on 10 samples with remaining amounts. As a result, one sample was 220 MPN/g, six samples were<0.6 MPN/g, and three samples were negative for Salmonella per 25 g. The mean aerobic bacterial counts and coliforms in these samples were 7.8 and 6.1 log 10 CFU/g, respectively. Furthermore, qualitative test for Salmonella and enumeration of hygienic indicator bacteria were conducted on dried wood ear mushroom products (33 domestic and 30 imported products) retailed in Japan. No samples showed positive for Salmonella per 25 g, and the mean aerobic bacterial counts and coliforms were approximately 2 log 10 CFU/g lower than those in the 10 samples where Salmonella was isolated during voluntary testing. While no Salmonella was detected in domestically retailed wood ear mushrooms products, the serovars associated with foodborne diseases were isolated from voluntary testing samples. It indicates that potential for consumption of Salmonella contaminated wood ear mushrooms, which is at risk of causing food poisoning.
    • Contributed Indexing:
      Keywords: Salmonella; contamination; dried wood ear mushroom; hygienic indicator bacteria; serovar
    • Publication Date:
      Date Created: 20240721 Date Completed: 20240721 Latest Revision: 20240721
    • Publication Date:
      20240722
    • Accession Number:
      10.3358/shokueishi.65.41
    • Accession Number:
      39034134