Improvement of the Physicochemical and Microbiological Quality of the Date’s Fruit Product in South Algeria by Adding Rosemary Herb

The dates are used to prepare several food products, among which the Btana is a best conservation form commonly practiced in the South-west area of Algeria. The peasants add during its preparation one or more aromatic herbs according to the choice and the areas. The present research aims relates to the study of the effectiveness of the methods used from the microbiological quality point of view and the determination of the effect of the plants added during the Btana preparations, for that we followed the evolution of the bacterial load during the conservation. The experience results obtained show a strong regression of the microorganisms in the samples containing Rosemary compared to those, which do not contain it. Another advantage of the use of Rosemary herb is that it enables us to stabilize the pH of date with a less acid degree of a higher quality; these results were supported by a complementary study, which consists in showing the effect of the essential oil of inhibiting Rosemary on some pathogenic microorganisms…etc.