Abstract
The purpose of this work is to correlate the production of ϵ-toxin in a set of strains of Clostridium perfringens type D with the presence of the etx gene, either genomic or in plasmids. Total DNA obtained from strains with a different level of toxin production was explored by PCR and all the strains showed the amplification signal. Different methods were used to obtain plasmid profiles and all of the bands were assayed by PCR. The detection of the etx gene was only shown in several high molecular plasmids. These results were confirmed by a Southern blot. We suggest that the localization of the etx gene in different plasmids could be associated with the ϵ-toxin production level.
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