Résumé:
This study consists in following the antibacterial effect of the Rosmarinus officinalis powder
grown in Ain Tedles gaden on five germs (Staphylococcus aureus, Total mesophilic aerobic flora
(FTAM), Fecal and Total Coliforms, and Psychotropic flora) contamination of minced meat of
bovine thigh of the Charolais breed from the butchery of the city center of Mostaganem during cold
storage at 4°C during 72 hours. The powder obtained after grinding and UV sterilization was
weighed and divided into 5 concentrations (20, 40, 60, 80 and 100%) and added to the 150g
samples of minced meat in double tests. Based on the results obtained, the quantitative
determination of total polyphenol by the Folin-Ciocalteu method revealed the richness of rosemary
in polyphenols (380,70 ± 2,77mg EAG/ g EBr). Rosemary powder has an anti bacterial activity
interest Hautmont significant (P 0.01) against Fecal Coliforms and Psychotropic flora on the other
hand there is no anti bacterial effect (P 0.05) on Staphylococcus aureus germs, Total mesophilic
aerobic flora, Total Coliforms. Finally, noting that the results obtained during this study show that
rosemary powder has a strong anti-bacterial effect on Fecal Coliforms and Psychotropic flora on
the other hand, we did not notice a great effect on the germs of Staphylococcus aureus, Total
mesophilic aerobic flora, Total Coliforms so this variance can be linked to the quality of the meat
studied or on the resistance of bacteria.
