The efficacy in the control of coccidiosis of the anticoccidial combination of salinomycin / nicarbazin, supplied in the feed at a dose of 40 ppm, was evaluated through changes in productive parameters in broilers challenged experimentally with local strainsof coccidia and raised up to 42 days of age. Broilers of the Cobb Vantress 500 line (n=450) were distributed into three experimental groups with 6 repetitions of 25 birds each. G1: chicks not challenged and treated with the anticoccidial combination, G2: chicks challenged and treated with the anticoccidial combination, and G3: chicks challenged and untreated. Body weight, body weight gain, feed consumption, feed conversion index, European productive efficiency index and the viability were determined. Broilers of groups G2 and G3 were challenged at 14 days with 1 ml of coccidia inoculum containing sporulated oocysts of Eimeria acervuli...

Se evaluó la eficacia en el control de la coccidiosis de la combinación anticoccidial de salinomicina/nicarbazina, suministrado en el alimento a una dosis de 40 ppm, por medio de la evaluación de parámetros productivos en pollos de engorde desafiados experimentalmente con cepas locales de coccidias y criados hasta los 42 días de edad. Se usaron 450 pollos de engorde de la línea Cobb Vantress 500, divididos en tres grupos experimentales con 6 repeticiones de 25 aves. G1: aves no desafiadas y tratadas con la combinación anticoccidial, G2: aves desafiadas y tratadas con la combinación anticoccidial, y G3: aves desafiadas y no tratadas. Se determinó el peso vivo, la ganancia de peso, el consumo de alimento, el índice de conversión alimenticia, el índice de eficiencia productiva europeo y la viabilidad. Las aves de los grupos G2 y G3 fueron desafiadas a los 14 días con 1 ml de in...

The aim of this study was to evaluate the protection of three immunization programmes against infectious laryngotracheitis (ILT) in broilers using two recombinant commercial vaccines. A total of 288 1-day-old Ross-308-line male birds were distributed in four experimental groups of 72 animals with three replicates of 24 birds per group. Group A was subcutaneously vaccinated at 1 day of age with a commercial recombinant fowlpox virus (FPV)-vectored vaccine expressing ILT virus (ILTV) glycoprotein B gene; Group B was vaccinated at day 14 of age with an inactivated vaccine by subcutaneous route and with the vaccine of Group A but applied via wing-web puncture; Group C was subcutaneously vaccinated at 1 day of age with HVT recombinant commercial vaccine expressing genes encoding for ILTV glycoproteins I and D; and Group D remained unvaccinated. All birds were challenged with ILTV pathogenic s...

The aim of this study was to evaluate the protection of three immunization programmes against infectious laryngotracheitis (ILT) in broilers using two recombinant commercial vaccines. A total of 288 1-day-old Ross-308-line male birds were distributed in four experimental groups of 72 animals with three replicates of 24 birds per group. Group A was subcutaneously vaccinated at 1 day of age with a commercial recombinant fowlpox virus (FPV)-vectored vaccine expressing ILT virus (ILTV) glycoprotein B gene; Group B was vaccinated at day 14 of age with an inactivated vaccine by subcutaneous route and with the vaccine of Group A but applied via wing-web puncture; Group C was subcutaneously vaccinated at 1 day of age with HVT recombinant commercial vaccine expressing genes encoding for ILTV glycoproteins I and D; and Group D remained unvaccinated. All birds were challenged with ILTV pathogenic s...