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Poultry vaccines
Disease prevention by vaccination is an integral part of flock health management protocols. Active immunization using live vaccines is the current industry standard. Routinely used vaccines in chickens include MDV, NDV, IBV, and IBDV, and in turkeys NDV and HEV. Newer vaccines, including molecular recombinants in which genes of immunogenic proteins from infectious agents are inserted into a live viral vector, are also being examined for commercial use. Efforts are under way to enhance vaccine efficacy by the use of adjuvants, particularly cytokines. The vaccine delivery systems include in ovo injection, aerosol, spray, drinking water, eye drop, and wing web injection. The in ovo vaccination procedure is relatively new and at the present time it is used primarily to vaccinate broiler chickens against MDV. Birds respond to vaccines by developing humoral and cellular immune responses. There are two main types of vaccine available for poultry: live or killed.
VACCINE FAILURES: WHY AND WHEN DO THEY OCCUR? Vaccination seeks to generate a protective immune response against a disease. Therefore, a vaccine failure occurs when a disease appears despite birds have been previously vaccinated . There are many factors involved in the efficacy of the vaccination, which are related to the vaccine, the pathogen, and the animals. ...
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Karel Schat (Cornell University) discussed diagnosis, method of vaccination and other recommendations regarding this disease, during IPPE 2020 in Atlanta, USA....
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Innovation, Sustainability, and Quality: Norel’s Approach to Animal Nutrition
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As a commercial chicken hatchery, what are the vaccines that are good to give and how to apply them? Thanks. In a tropical country, is it good to open wall ventilation and exhaust for taking air out? ...
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FIGAP 2026: The Scientific And Technological Exhibition Of The Livestock Industry
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INTRODUCTION Inactivated vaccines are commonly used in poultry as part of a comprehensive vaccination protocol. These vaccines are capable of inducing high antibody titers, which can protect against systemic infections and are transferred from breeder hens to their progeny as maternal antibodies. In order to increase the immunogenicity, these vaccines contain adjuvants. The most common adjuvants in poultry vaccines are aluminum hydroxide gel (Alum) and...
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Effects of methionine supplement sources and crude protein on Ross 708 male broiler performance
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I would be grateful if somebody tell me if I vaccinated a flock with ts-11at 10 week old if at 26 week -old found the mean titer of Mycoplasma gallisepticum 1454 is that a titer of the vaccine or field challenge . When does the antibody titer following vaccination at 10 week -old with ts-11 wane to negative titer t ...
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Strategic Care for Chicken in Cold Weather: Combating Poultry Viral Diseases
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Highlights from the conversation with Johan Van Erum, Derek Detzler, Maria Elena Rubio and Horacio Gamero, who joined Elizabeth Santin for this roundtable, during the 1st PoultryUniverse Coccidiosis Congress in Curitiba, Brazil....
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Necrotic enteritis (NE) is one of the top enteric infectious diseases in commercial broiler chickens that is caused primarily by Clostridium perfringens (CP) A/G strains and responsible for around $6 billion economical loss worldwide. Coccidiosis is the major predisposing factor for NE. With gradual reduction and eventual withdrawal of antibiotic growth promoters from animal feed due to public and regulatory pressures, alternatives to antibiotic approaches assume top- priority for...
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Introduction. Salmonella Gallinarum with the biotypes Gallinarum and Pullorum causes two septicaemic diseases in poultry: Fowl Typhoid and Pullorum Disease. The former Salmonella Pullorum serovar is not recognised anymore as such. Both biotypes are differentiated by a few biochemical and molecular tests. This bacterium is highly adapted to produce a septicaemic disease in birds. In general all other animals’ species...
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INTRODUCTION Newcastle disease virus (NDV) is Avian avulavirus type-1 that belongs to the genus Avulavirus of the family Paramyxoviridae (Swayne and Glisson, 2013). Newcastle disease virus isolates vary in their pathogenicity to chickens and may include at least 3 pathotypes; lento-genic (low virulence), mesogenic (moderate virulence), and velogenic (high virulence). Velogenic NDV remain a major threat to the poultry industry because of high mortality and reduced egg production...
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Updated Vitamin Requirements Across Species: Microvit® Nutrition Guide
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Avian coccidiosis is one of the most economically damaging infectious diseases affecting poultry. The etiologic agent is Eimeria spp., an obligate eukaryotic intracellular parasite belonging to the phylum Apicomplexa, which infects chickens’ intestinal tracts and is transmitted through a fecal-to-oral route (7,49). Clinical manifestations of infection include damage to the intestinal epithelium, decreased nutrient absorption, inefficient feed utilization, and impaired growth rate,...
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