Influence of salt and millet treatments during meat fish fermentation in Senegal

Diop Michel Bakar, Fall Moussou, Konte Mamadou Abdoulaye, Montet Didier, Maiga Amadou Seidou, Guiro Amadou Tidiane. 2019. Influence of salt and millet treatments during meat fish fermentation in Senegal. Journal of Food Research, 8 (2) : 1-14.

https://doi.org/10.5539/jfr.v8n2p1

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Résumé : Microbial growth in meat from traditional handled Arius heudelotii fish during fermentation at 25-30°C in Senegal has been determined. Microorganisms involved in fermentation and pathogen microorganisms were analyzed in function of salt and millet addition [1/1 (w/v)]. Total viable microorganisms, lactic acid bacteria, H2S-producing Enterobacteriaceae, staphylococci, fungi and spore-forming bacteria counts in the crude meat fish reached 6.34 ± 0.28, 4.10 ± 0.61, 4.33 ± 0.45, 3.71 ± 0.69, 1.50 ± 0.3 and 1.33 ± 0.58 Log10 CFU/g. H2S-producing bacteria predominated (8.3 ± 0.25 Log10 CFU/g) after 24 h incubation at 25-30°C of untreated meat fish or that immersed in saline [14% NaCl (w/v)]. The pH of raw meat fish was 6.32 ± 0.1. It increased during unsalted fermentation, while it slightly decreased for the saline procedure. Meat fish fermentation in salty water added with NaCl at 80% (w/v), widespread in Senegal, allowed weak acidification in addition to growth inhibition of H2S producing Enterobacteriaceae which dropped to 3.53 ± 0.45 Log10 CFU/g after 24 h of fermentation. The fish fermentation in water added with malted millet flour at 15% (w/v) enabled significant growth of lactic acid bacteria and pH dropping to 4.9 ± 0.19. SH2-producing Enterobacteriaceae, Staphyloccoci and spore-forming bacteria showed a weak growth in the meat fish significantly acidified in millet solution, indicating preservative factor improvement when compared to the abusive salting traditional procedure which is a dietetic concern.

Mots-clés Agrovoc : Arius heudelotii, poisson (aliment), technologie traditionnelle, fermentation, millet, sel, bactérie pathogène, traitement des aliments

Mots-clés géographiques Agrovoc : Sénégal

Mots-clés libres : Fermentation, Fish, Millet, Pathogens, Senegal

Classification Agris : Q02 - Traitement et conservation des produits alimentaires
Q03 - Contamination et toxicologie alimentaires

Champ stratégique Cirad : CTS 3 (2019-) - Systèmes alimentaires

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