Browsing by Author "Zineddine, R."

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Chemical composition and antibacterial activity of rosmarinus officinalis essential oil from algeria
    (2021) Hezil, Djamila; Benseghir, H.; Benamrouche, S.; Zaidi, S.; Zineddine, R.; Bessas, A.; Msela, A.
    The aim of this study was to study the chemical composition and the antibacterial activity of the essential oil (EO) of Rosmarinus officinalis from Blida region, against bacterial strains: Escherichia coli, Staphylococcus epidermis and Pseudomanase fragi. The chemical composition of the EO obtained by hydrodistillation was determined using gas chromatography coupled with mass spectrometry (GC-MS). The antibacterial activity of the EO was studied by the disk diffusion method and the agar dilution method in order to determine the minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (CMB). The results obtained from this work show that the yield of rosemary EO was 1.6% respectively. The main compounds present in the essential oil of R. officinalis are 2-Bornanone (19.47%), Eucalyptol (18.58%), α-Pinene (9.14%) and Camphene (5.68%). The MIC and CMB values expressed by the essential oil of R. officinalis were identical as for P.fragi and S. epidermidis (MIC is equal to 0.37% and CMB> 3%) and for E .coli were 0.75% (MIC equals CMB). The results of this work confirmed the activity of the EOs of R. officinalis on the pathogenic bacterial strains tested and to recommend its exploitation for use as an alternative to industrial antibacterial molecules.
  • No Thumbnail Available
    Item
    Serological study of salmonella Dublin carriage in cows in khenchela, Algeria
    (2021) Hezil, Djamila; Benseghir, H.; Zaidi, S.; Zineddine, R.; Zaatout, N.; Msela, A.; Ghalmi, F.
    The objective of this study is to estimate the seroprevalence of S. Dublin infection in healthy cows in the Khenchela region and to identify potential risk factors that may be associated with the presence of S. Dublin antibodies. 194 cows sera from 35 farms were tested using an enzyme-linked indirect immunosorbent assay (ELISA) and the results showed a prevalence of 9.23% (18/194, 95% CI 5.17-13.29). The logistic regression model indicates that none of the factors tested were found to be significantly associated with S. Dublin seropositivity. We concluded that S. Dublin circulates in cattle farms in the Khenchela region of Algeria. In addition, we recommend the implementation of hygiene practices and biosecurity measures on farms to reduce the spread of infection and the use of vaccination in animals and people at risk.