Efficiency of essential oils in treating broiler infection caused by Salmonella enteritidis: [Master thesis]
2006
Ratajac, R.
The aim of this study has been to investigate the antimicrobial activity of essential oils - eugenol, cinnamaldehyde, carvacrol, thymol and the effect of their combinations, against filed strain Salmonella enteritidis (SE) in the laboratory (determination of MIC) and in vivo studies on broilers. Carvacrol and thymol have been identified as most effective antibacterials having the minimum of inhibitory concentrations (MIC) of 0.156 mg(microl)/ml in vitro. In vivo EOs were administered in doses of 60 mg/kg of body weight over a period of seven days to broilers, that had previously been experimentally infected with SE. Cinnamaldehyde, carvacrol and thymol reduced the number of infected birds in 72.22% of the cases, and the efficiency of combinations of eugenol and cinnamaldehyde, also carvacrol and thymol were 50% and 44.44%, respectively. The effect of eugenol, in treating broiler infection caused by SE, was less than of other EOs, i.e. it was 39%.
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