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Authors العربیة
Evaluation of the effect of common antibiotics used in the farm production , on theimmune system of chickens during the 21 days of life were investigated. A total of 60,one-dayold chicks were divided into Four equal groups and was raised for 30 days.Three groups were treated with Ampieillin, Enrofloxacin & Amoxyeillin respectivelywhereas the4"‘group was served as control. Antibiotic treatment was similar to regimenused in commercial chicken production. which included utilization of antibiotic at1“ day of life and after vaccination. Body weight, bursa of fabrieius weight and bursa offabrieius to body weight ratio were calculated in order to monitor the growth rate ofbursa during the 2] days of life. All birds were vaccinated against ND at 7&2ldays ofage. Blood samples were collected at l4&?.9 days of age. Blood total protein, albuminand globulin were determined. Antibiotic treatment often resulted in significantdecrease (l’
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