K. GENOVA and T. MEHMEDOV
Faculty of Veterinary Medicine, University of Forestry, 1756 - Sofia, Bulgaria
GENOVA, K. and T. MEHMEDOV, 2016. Study of performance on natural resistance in pheasants, infected with pathogenic strain of E.coli and treated with Enterococcus Faecium M74. Bulg. J. Agric. Sci., 22: 140–143
Probiotics are live micro-organisms that bring benefits to consumer health. It is well known that they are used for prevention of bacterial diseases in poultry, as well as to potent the growth performance and immune response of poultry.
The present work was carried out to evaluate the effectiveness of probiotic Laktiferm Basic 300® on natural resistance in pheasants, infected with pathogenic strain of E.coli.
Pheasants were inoculated intra ingluvial with enteropathogenic strain of E.coli O 103 in an amount of 108 cfu/ml on the 3rd day and divided into four equal groups: Group (1) served as a positive control group, received colistin sulfate. Group (2) was negative control. Group (3) was fed with the probiotic while group (4) was fed with nutritional antibiotic Pharmastim 8%®. Evaluations were made for immunological changes. Our results showed that Enterococcus Faecium M74 possesses positive effect on phagocytic activity and on bactericidal activity of blood serum. Significant decrease was recorded in the phagocytic percent and phagocytic index of neutrophils of pheasants in negative control.