A study on stress induced effects in broilers after vaccination (Angavac) against Hydropericardium syndrome (HPS)
2000
Tipu, M.Y. (College of Veterinary Sciences, Lahore (Pakistan))
The main aim of this study was evaluation of vaccination (Angavac) stress against hydropericardium syndrome with an oil- based vaccine and possible measures to check that stress. For this purpose one hundred and seventy chicks (day-old) were randomly: divided into four groups namely, A, B, C and D. Each group comprised of forty birds while ten birds were used to collect serum samples for evaluation of maternal antibody titre in the chicks. Group "A" was kept as control while group B, C and D were vaccinated against hydropericardium syndrome (HPS). Group "B" was kept as such while group C and D were supplemented with multi-vitamins and aspirin respectively in drinking water. Blood samples were collected at 24, 48 and 72 hours post vaccination from ten randomly selected birds from each group to study heterophil/lymphocyte ratio and change in serum chemistry i.e. (protein, glucose and cholesterol). Blood serum was also collected from 10 randomly selected birds of each group an day 14, 28 and 42 of the experiment to see the level of antibody titre in the groups. Adrenal/body weight ratio, pathological examination of adrenal gland and economics of the flock was also studied at the end of experiment. Vaccine did not cause any significant stress in broilers. However, multivitamin therapy gave better growth traits and increased profit.
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