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1
artículo
A vaccination programme against Avian metapneumovirus (aMPV) in broilers was evaluated using a live virus vaccine against aMPV with the strain chicken 1062, title of 102.4 DICT50 sprayed at first day of age. The study conducted in two commercial farms of poultry growers, located in a region where the Swollen Head Syndrome (SHS) is prevalent. A flock of 185 593 1-day old broilers of both sexes, Cobb Vantress 500 line, were distributed in a vaccinated group against aMPV and a control group not vaccinated against aMPV. It was evaluated the presentation of SHS, intensity of respiratory signs, post mortem lesions, productive parameters, mortality, and serological response by indirect ELISA test. Only the vaccinated group had birds with SHS during the 3rd and 4th week of age, showing intense respiratory signs and severe post mortem lesions at respiratory tract level. The control group showed b...
2
artículo
Publicado 2009
Enlace
Enlace
A new vaccination programme against infectious bursal disease using a virusantibody complex vaccine in comparison with a traditional programme under field conditions was evaluated. In each group, 21,800 broiler chickens of Cobb Vantress 500 line were used. The experimental group was vaccinated with the strain 2512 in combination with specific antibodies at the incubation plant on day 18 of embryonic development, whereas the control group received two vaccines of live virus, the Bursine®2 and Bursa Blen, administered by drinking water at 8 and 19 days of age respectively. Body weight, feed conversion index, European Production Efficiency Index, mortality, bursal index, histopathological lesions, and antibody levels against IBDV were evaluated. Birds of the experimental group showed higher body weight (p<0.05), and better feed conversion index and production efficiency index at 47 days...
