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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.
Dear all,
Recently some poultry vaccine manufacturers produce recombinant HVT-ILT vaccine to give protection against both MD and ILT. We are wondering about these issues: 1. Safety of this kind of vaccines 2. Some poultry producers are using ordinary MD vaccines (bivalent or trivalent), therefore does the use of recombinant vaccines give good protection instead of bivalent or trivalent ones? If no, what is the...
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Newcastle Disease Virus, Infectious bronchitis virus (IBV), Avian metapneumovirus and other respiratory agents are, in spite of vaccination(s), major causes of respiratory problems in broilers and of poor egg production in breeders and layers in many parts of the world. Many vaccines that are being used have shown under experimental conditions that they are able to provide a high level of protection against an homologous challenge. This...
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The Poultry CRC is supporting an 18 month research project aimed at the development of a live vaccine for the control of Mycoplasma gallisepticum (MG) related chronic respiratory disease in turkeys. The project being headed by Bioproperties R&D Manager, Dr Rima Youil, is a collaborative effort between The University of Melbourne and Bioproperties Pty Ltd. The research, titled Development of a temperature...
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Protecting poultry against disease involves more than simply administering preventive vaccines. Disease prevention is a complex and multifaceted process. Vaccine quality is commonly blamed when a disease occurs; however, there are usually other factors responsible. A comprehensive investigation is often called for to identify the cause(s) and to resolve the problem.
Commercial poultry farms have continued to increase in size and more birds and farms...
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Introduction
Avian coccidiosis is a common parasitic disease of broiler chickens caused by single protozoan parasite of the genus Eimeria that infect the intestinal tract and is transmitted among the birds via ingestion of infective oocysts during feeding. Coccidiosis cause a substantial economic cost to the poultry industry that is calculated on more that $800 million in annual losses (9). Losses are attributed to feed medication for...
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Introduction Infectious Bronchitis consider one of the epidemic respiratory diseases over the world infected poultry in different stage of age, instead of its respiratory but can infected genital tract of female layer and parent breeder leading to produce bad eggs quality as well as decrease production level their target specially in mature birds leading to swelling of kidney, finally high mortality [1] ...
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Introduction Infectious bursal disease, also known as Gumboro disease, has caused great economic losses in the poultry industry in different parts of the world due to mortality and immunosuppression. It is a contagious acute viral disease of young birds. The disease may be clinical with variable mortality, and subclinical without mortality. The clinical form of the disease occurs in birds from the third week of age and...
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Dear all salam I'm veternarian from Iraq and work as assistant lecturer in agriculture college work on vaccination programm against IBD and IB diseases i need any new researchs about this topic if any one can help me with my regards. ...
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Gumboro disease is one of the major diseases of chickens and is present in most of the chicken producing countries. Infection can seldom be avoided, mostly due to the high resistance of its causative agent in the environment, and vaccination is the only way to prevent the possibly heavy corresponding negative consequences. This video summarizes the key points to consider for the establishment of a sound vaccination program, including presentation of the types of vaccines and vaccination...
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The Poultry Cooperative Research Centre (Poultry CRC) has been recognised for its collaborative efforts with industry and research partners in the development of a vaccine against fowl cholera, Vaxsafe® PM.
The award, for significant innovation in Agriculture and Food, was made at the Cooperative Research Centres Association (CRCA) Conference on May 16. As CEO of the CRCA, Professor Tony Peacock, explains "the Australian...
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New research from the University of Georgia indicates that multivalent vaccination can hinder immunity against infectious laryngotracheitis.
Producers should reduce the number and diversity of live-virus vaccines given in the field when also vaccinating for infectious laryngotracheitis (ILT), investigators from the University of Georgia advise.
In their study,...
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Introduction
The ILT disease was officially reported in Peru in August 2008, after the emergence of several outbreaks which began in the second quarter of that year and was characterized by a high morbidity and mortality. The disease was reported for the first time in poultry farms in the Department of Lima. Later on, the disease was described in other areas, including the departments of Arequipa,...
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Introduction During the last decades, infectious bronchitis in hens, (BIG), has caused enormous economic losses in the poultry industry. Its main prophylactic measure is based in the use of attenuated live vaccines, combined or not, with inactivated vaccines (Cavanagh & Naqi, 1997). In general terms, vaccination of flocks against the virus of infectious bronchitis in hens (VBIG) is performed at day one, after birth,...
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Introduction The Newcastle disease virus in its velogenic form continues to be a serious problem in the poultry industry worldwide. Biosecurity and vaccination measures are the more effective control methods currently available. However, the antigenic and genetic diversity of the virus has put a phylogenetic distance of the current vaccine strains from the recent velogenic isolates found in Central and South America...
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Dr. Sayed Abd El-Whab, MVScs and BVMSCs from the Friedrich Loeffler Institute, speaks about vaccine efficacy against HPAIV H5N1, at the XVII World Veterinary Poultry Association Congress in Cancun, Mexico. ...
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Introduction
Vaccines are one of the most cost-effective medical technologies. Traditional vaccines have many practical disadvantages regarding their production, usage and efficacy. The application of live attenuated vaccines has a severe threat of producing unwanted medical complications in case of uncontrolled growth of vaccine agent. A killed vaccine requires multiple administrations that increase the cost...
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Andrés Montoya, Manager of Technical Service-Poultry at Novus International Inc., speaks about the behaviour in the field of a coccidia vaccine in broiler chickens during 2010 in USA, at the XVII World Veterinary Poultry Association Congress, Cancun, Mexico. ...
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Vaccines are used to prevent or reduce problems that can occur when a poultry flock is exposed to field disease organisms. Vaccinations should be thought of as insurance. Like insurance, there is a price to be paid for protection against a potential threat. Costs include price of the vaccine, time spent designing the vaccination schedule and administering the vaccines, and losses due to vaccine reactions from the live-type vaccines...
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A controversial discussion: Which one provides long immunity? ...
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