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  • Title: Analysis of Salmonella enteritidis strains isolated from food-poisoning cases in Taiwan by pulsed field gel electrophoresis, plasmid profile and phage typing.
    Author: Tsen HY, Lin JS.
    Journal: J Appl Microbiol; 2001 Jul; 91(1):72-9. PubMed ID: 11442716.
    Abstract:
    AIMS: To establish the molecular typing data for Salmonella enteritidis due to its increasing role in Salmonella infections in Taiwan. METHODS AND RESULTS: Sixty-three Salm. enteritidis strains isolated from related and unrelated patients suffering from food-borne poisoning during 1991-97 were collected and subjected to pulsed field gel electrophoresis (PFGE), plasmid analysis and phage typing. For PFGE, XbaI, SpeI and NotI restriction enzymes were used for chromosomal DNA digestion. The results showed that, for these 63 Salmonella strains, 10 PFGE pattern combinations were found. Of these, pattern X3 S3 N3 was the major subtype, since 46 strains isolated from different locations at different times during 1991-97 showed this PFGE pattern. Plasmid analysis showed only three plasmid profiles and phage typing showed that most of the Salmonella strains were of the phage type PT4. CONCLUSION: Most of the Salm. enteritidis strains circulating in Taiwan are of very similar genetic types or are highly related and that strains of PFGE pattern X3 S3 N3 are the prevalent and recirculating strains of Salm. enteritidis which caused food-poisoning cases in Taiwan in 1991-97. SIGNIFICANCE AND IMPACT OF THE STUDY: This study provides information that in Salmonella infection, certain subtypes of Salm. enteritidis should be scrutinized.
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