The objective of this study was to test the efficacy of an attenuated coccidiosis vaccine in combination with different feed additives in preventing loss of production performance and intestinal lesions in broilers challenged with NE.
Over the last year some companies in Brazil decided to incorporate the vaccine into their broiler chickens coccidiosis control
programmes. These companies are generating a large volume of results under normal field conditions, which therefore represent the reality of Brazilian poultry farming.
Most of the coccidiosis vaccines available for chickens are living parasites that have to go through two and sometimes even three life cycles in the intestine of the host to activate the immune system and thus achieve fully protective immunity.
In industrial poultry production, designing a preventive programme for controlling coccidiosis is one of the most important decisions to be made in order to safeguard or improve zootechnical and financial results.
The pathogenesis in chickens of the apicomplexan Eimeria praecox was compared with that of Eimeria acervulina, using intestinal lesions, mucosal integrity, body weight ain (BWG) and the feed conversion ratio (FCR) as criteria.
The study was designed to assess the immunogenicity of the vaccine strain E. maxima 013 when administered in 1-day-old chicks (minimum recommended age for vaccination) against six heterologous pathogen strains from six very different geographic locations.
Duration of immunity of Evalon® was studied under laboratory conditions in facilities that impaired the introduction of external Eimeria oocysts and that do not favour reinfections. The DOI was evaluated during 60 weeks.
EVALON® is a live coccidiosis vaccine against avian coccidiosis composed of five attenuated strains.
Avian coccidiosis is one of the most important diseases affecting the intensive poultry industry worldwide. In spite of this few studies are available on the distribution of species in the field.
Avian coccidiosis is one of the most important diseases affecting the intensive poultry industry worldwide.
Antimicrobial resistance has become a global public health problem in humans and livestock.
Vaccination against coccidiosis in broilers has become an increasingly important part of a global prevention strategy against the disease. Not only it is an effective treatment against the clinical disease, but it also represents a clear improvement in zootechnical results when vaccines are rotated with classic anticoccidial programmes. There are several studies in HIPRA’s Area Coccidia that show and explain these improvements.
Coarse spray is intended for the oral administration of vaccines at the hatchery. For consistent vaccination, the active ingestion of vaccine water droplets by birds is crucial.
After the efficacy and safety of a new live vaccine against avian coccidiosis (EVALON®) had been demonstrated by experiments under laboratory conditions, these were then evaluated in a Good Clinical Practice-compliant multicentre trial under field conditions.
Coccidiosis still is one of the most costly diseases in modern broiler production. The most important reason for this financial loss is an increased feed conversion ratio (FCR) and a decreased weight gain (Williams, 1999), which is even more pronounced when feed costs are high.
In industrial poultry production, designing a preventive program for controlling coccidiosis is one of the most important decisions to be made in order to safeguard or improve zootechnical and financial results. Usually in-feed anticoccidials are used in these programs and traditionally were considered sufficient for controlling clinical coccidiosis.
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