Amélioration de la qualité microbiologique du poisson fumé Arius spp par des extraits végétaux
Résumé
The microbial quality of smoked catfish (Arius spp) pre-treated by plant extracts with antimicrobials and antioxidants properties was examined during two weeks storage at 4°C. Extracts of garlic Alliun sativum and seeds of Moringa oleifera were prepared in a ratio of 20%. Eviscerated fish were washed and soaked for thirty minutes before being smoked. Smoking tests were carried out on two sites and microbiological analyzes in duplicate. Germs due to alteration were investigated in samples the first, seventh and fifteenth days. It was total aerobic mesophilic flora, total and fecal coliforms, sulphite-reducing anaerobes, coagulase negative staphylococci and yeast - mold. Results showed a significant reduction in all strains sought. It reaches 97 % to 100% compared to the control group. In the test conditions, the inhibitory action of Moringa seeds seems more pronounced than garlic. This bacteriostatic effect of garlic extracts and Moringa improve the microbial quality of smoked fish and extend its deadline for optimal use. This new pre-processing operation can be validly used by producers.
Keywords: Smoked Arius spp, preservatives, Plant extract, microbial safety,
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