PCR is an important tool in molecular biology for amplification of short sequences of DNA. PCR-RFLP does not require the cumbersome blotting technique used in RFLP. Moreover, in RFLP, the DNA used is in the methylated form due to in vivo modification by cellular methylases, which methylate adenine or cytosine, protecting it from the cells’ own restriction enzymes. Thus, the RFLP analysis requires a careful choice of restriction endonuclease to avoid inhibitory effects of methylations in the DNA. Both these problems are overcome by PCR-RFLP. PCR-RFLP involves the use of specific primers to amplify specific genetic loci. Amplicons are then subjected to restriction endonuclease analysis with different enzymes and fingerprints are then compared. PCRRFLP of polar flagellar genes (fla genes) is a valuable tool for typing bacteria like Campylobacter (Owen et al., 1994) and Vibrio parahaemolyticus (Marshall et al., 1999).