Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/69941
標題: Development of a PCR-denaturing gradient gel electrophoresis method targeting the tuf gene to differentiate and identify Staphylococcus species
作者: Chen, H.C.
Hwang, W.Z.
關鍵字: staphylococcus species
staphylococcal poisons
identification
DGGE
tuf gene
coagulase-negative staphylococci
enterotoxin production
polymorphism
analysis
bovine mastitis
identification
intermedius
infection
sausages
milk
food
期刊/報告no:: Journal of Food and Drug Analysis, Volume 16, Issue 4, Page(s) 44-51.
摘要: Staphylococcal intoxications are often associated with staphylococcal enterotoxins produced by Staphylococcus aureus. However, several studies revealed that other Staphylococcus species, such as S. intermedius and S. warneri, could produce enterotoxins as well. To facilitate the identification of a mixed culture while tracing the causative staphylococci of food poison, a polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) method was developed to differentiate Staphylococcus species using Staphylococcus-specific primers targeting the elongation factor Tu gene (tuf gene). Eleven tested species were differentiated to 10 separated patterns. Variance of the patterns between strains within a species was analyzed using 9 strains of S. aureus and several strains of other species. It was shown that strains within a species migrated the same distance in the DGGE assay. When mixed cultures of different Staphylococcus species in milk were subjected to DNA extraction and PCR-DGGE, the resulted patterns faithfully corresponded to the species of the mixed cultures, including those of potential to secret enterotoxins.
URI: http://hdl.handle.net/11455/69941
ISSN: 1021-9498
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