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  • Title: Application of random amplified polymorphic DNA analysis to differentiate strains of Salmonella typhi and other Salmonella species.
    Author: Shangkuan YH, Lin HC.
    Journal: J Appl Microbiol; 1998 Oct; 85(4):693-702. PubMed ID: 9812381.
    Abstract:
    A Random Amplified Polymorphic DNA (RAPD) fingerprinting method was developed to differentiate isolates of Salmonella serotype typhi (S. typhi) and other Salmonella isolates. A panel of five primers was used to examine 63 isolates of Salm. typhi, including 56 strains isolated in Taiwan and seven strains obtained abroad. Twenty-one RAPD types were revealed using the RAPD fingerprinting method. An RAPD with primer 6032 yielded a polymorphism in a 350 bp fragment that differentiated the attenuated vaccine strain Salm. typhi Ty21a from the rest of the Salm. typhi strains. Strains of Salm. typhi were divided into five types with primer D14307. Primer D14307 also proved capable of discrimination among 65 other Salmonella isolates representing 42 different serotypes. The bacterial DNA used in this RAPD protocol was obtained using a commercially available DNA extraction kit (GeneReleaser). The DNA of various strains of Salmonella from this simple extraction procedure could be discriminated within a few hours using the RAPD technique.
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