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African Journal of Biotechnology

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Assessment of the physiological and biochemical characterization of a Lactic acid bacterium isolated from chicken faeces in sahelian region

Ali Bayane, Dominique Roblain, Robin Dubois Dauphin, Jacqueline Destain, Brehima Diawara, Philippe Thonart

Abstract


The aim of this work was the examination of the microbiological and technological properties of a lactic acid bacterium (CWBI-B623) isolated from chicken faeces in sahelian region (Burkina Faso). The strain CWBI-B623 is a Gram positive rod, asporogenous, catalase-positive, facultatively anaerobic, non motile and mesophilic. The analysis showed that it produce L(+)-lactic acid via homofermentative pathway and it was able to ferment an important number of the carbohydrates of API 50CHL system. The 16S-rDNAsequence analysis revealed that the isolate was phylogenetically a member of the genus Lactobacillus and formed a subline within the Lactobacillus casei cluster. The minimal inhibitory concentration of CWBI-B623 for bile salts was higher than 1% and the survival rates to acidity with pH 3.0 and pH 2.5 were 26 and 1.2%, respectively. CWBI-B623 is an Lactobacillus casei species based on its physiological and biochemical properties and it could be a good candidate for probiotic formulations.

Key words: Lactic acid bacteria, Lactobacillus, probiotic, biodiversity.




AJOL African Journals Online