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2004Nol P; Williamson J L; Rocke T E; Yuill T M
Detection of Clostridium botulinum type C cells in the gastrointestinal tracts of Mozambique Tilapia (Oreochromis mossambicus) by polymerase chain reaction.
Journal of wildlife diseases 2004;40(4):749-53.
We established a method of directly detecting Clostridium botulinum type C cells, while minimizing spore detection, in the intestinal contents of Mozambique tilapia (Oreochromis mossambicus). This technique involved extraction of predominantly cellular DNA from tilapia intestinal tracts and used a polymerase chain reaction assay to detect presence of type C1 toxin gene. We consistently detected C. botulinum type C cells in tilapia gastrointestinal contents at a level of 7.5 x 104 cells per 0.25 g material or 1.9 x 103 cells. This technique is useful for determining prevalence of the potentially active organisms within a given population of fish and may be adapted to other types of C. botulinum and vertebrate populations as well.

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