Document Type : Scientific and Research
Authors
1
*Department of Poultry Diseases, .Animal Health Research Institute, Agriculture Research Center,Dokki,Gizza,Egypt
2
Department of Poultry Diseases, Animal Health Research Institute, Agriculture Research Center,Dokki,Gizza,Egypt
3
Department of Biochemistry, Nutritional Deficiency and Toxicology, Animal Health Research Institute, Agriculture Research Center,Dokki,Gizza,Egypt
4
Department of Bacteriology.Animal Health Research Institute, Agriculture Research Center,Dokki,Gizza,Egypt
Abstract
This study was conducted to compare the effects of two types of organic acids (caprylic acid and propionic acid) for control of salmonella infection in broiler chicks. A total of 165, one day-old (Cobb 500) broiler chicks were used. At day old, five chicks were sacrificed and examined bacteriologically to prove their freedom from S. Enteritidis infection. One hundred and sixty birds were divided into eight equal groups.
Chickens in (G1) non infected-non treated birds, (G2) wasinfected non treated birds, (G3) was infected and treated with caprylic acid1%,(G4) non infected and treated with caprylic1%,(G5)infected and treated with propionic acid1.2%, (G6) non infected and treated with propionic acid 1.2%,(G7) infected and treated with caprylic1% and propionic acid1.2%,(G8) non infected and treated with caprylic1% and propionic acid1.2%. All birds in (G2, G3 G5, and G7) were challenged 105CFU/ml S.Enteritidis at 7days of age. All the groups were kept under complete observation for four weeks for recordingsigns, moralities, gross lesions, shedding rate of S. Enteritidis, the performance. Five birds from each group were euthanized on days 21and 35day of age and examined bacteriologically for re-isolation of Salmonella Enteritidis from cecum and crop (quantitative and qualitative), liver, spleen were tested qualitative .pH in crop and cecum were measured.Plasma samples were collected from the portal vein to determine medium chain fatty acids and short chain fatty acids. Results indicated that treatment with organic acids decreased reisolation of Salmonella Enteritidis from different organs, reduced colonization ofSalmonella Enteritidis in the crop and cecumand fecal shedding. Birds supplemented with organic acidsshowed significantly (P≤0.05) higher body weight, body weight gains and lower feed conversion ratio compared to control group. Chicks treated with acids had an increase MCFA (caprylic acid) and decrease in SCFA (acetic acid and propionic acid) in portal bloodthan the control group.
The present study was able to show that this organic acids were useful in controlling of Salmonella Enteritidis in infected chicks and this procedure can be important as part of a Salmonella control program.
Keywords
Main Subjects
)
View on SCiNiTO