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      Technically sound and sustainable Newcastle disease control in village chickens: lessons learnt over fifteen years

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      World's Poultry Science Journal
      Cambridge University Press (CUP)

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          Abstract

          Village chickens can be found in all developing countries and play a vital role in the livelihood strategies of many poor rural households. The implementation of effective village poultry production programmes in Asia, Africa and Latin America has resulted in increased poultry numbers, household purchasing power, home consumption of poultry products and decision-making power for women.

          The rapid and wide geographical spread of highly pathogenic avian influenza subtype H5N1 has drawn attention to the neglect of village poultry health. This crisis has presented an opportunity to invest in improved village poultry husbandry that can make a positive contribution to human development in rural areas across a range of endeavours including: empowerment of women (increased productivity, knowledge, participation in community life as vaccinators, etc); HIV/AIDS mitigation; wildlife conservation through a reduction in bushmeat consumption; improved understanding of disease transmission, prevention and control, human nutrition and hygiene; and, most importantly building trust between communities and government agencies.

          Key recommendations to support technically sound and sustainable Newcastle disease control programmes in village chickens include encouraging veterinary pharmaceutical manufacturers to develop and observe a code of conduct that supports the supply of appropriate vaccine with an adequate shelf life, giving instructions in local languages, using temperature indicators in vaccine containers and discouraging the payment of commission on the purchase of vaccine. Quality assurance activities should be built into all vaccination programmes to improve cost-efficiency, and should include post-vaccination serological monitoring of a representative sample of birds, especially when a new vaccine or new disease control programme is introduced. Also required is the participation of farmers (male and female) in monitoring and evaluating the effectiveness of vaccination campaigns; and active collaboration with the Ministries of Agriculture, Health and Education in village poultry improvement programmes.

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          The Role of Family Poultry in Poverty Alleviation, Food Security and the Promotion of Gender Equality in Rural Africa

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            The challenge of avian influenza to the veterinary community.

            Avian influenza (AI) is a listed disease of the World Organisation for Animal Health (OIE) that has become a disease of great importance both for animal and human health. The increased relevance of AI in the fields of animal and human health has highlighted the lack of scientific information on several aspects of the disease, which has hampered the adequate management of some of the recent crises. Millions of animals have died, and there is growing concern over the loss of human lives and over the management of the pandemic potential. The present paper aims to identify areas of knowledge of veterinary competence that need to be improved in order to generate information to support the global AI crisis, and highlights the major changes in AI legislation, including regulations related to trade. It also reviews the human health implications of AI, including the mechanisms by which a human pandemic virus may be generated, and the food safety issues related to this infection. The application of control policies, ranging from stamping out to emergency and prophylactic vaccination, are discussed on the basis of data generated in recent outbreaks, and in the light of new regulations, also in view of the maintenance of good animal welfare. Poultry veterinarians working for the industry or for the public sector represent the first line of defence against the pandemic threat and for the prevention and control of this infection in poultry and in wild birds. However, given the current situation, it is imperative that close collaboration is sought and achieved by health officials involved in the veterinary, agricultural and medical aspects of the disease. Only through the exchange of data, experiences, views and information will it be possible to combat this zoonosis, which represents a major threat to public health and animal well-being.
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              Newcastle disease virus strain I2--a prospective thermostable vaccine for use in developing countries.

              Forty-five avirulent Australian strains of Newcastle disease virus had been examined for antigenicity in chickens and 18 of these were tested for thermostability. Strain I2, chosen for a combination of antigenicity and thermostability, was artificially selected for enhanced thermostability. Master seed material was then prepared in minimal disease eggs, and vaccine by a further two passages in conventional eggs. Strain I2 virus at seed and vaccine level induced adequate levels of antibody in chickens vaccinated by eye drop and usually in their contacts. The serological response to oral vaccination was less certain. Antibody titres indicative of substantial protection against virulent challenge were maintained in a simulated village flock for 38 weeks by vaccination of the foundation flock on two occasions, with subsequent vaccination confined to clutches of chicks as they were produced. Strain I2 virus survived for at least 12 weeks when stored at 22 degrees C in 1% gelatin. Strain I2 is suitable for local production of thermostable vaccine in regional laboratories in developing countries.
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                Author and article information

                Journal
                applab
                World's Poultry Science Journal
                Worlds Poult. Sci. J.
                Cambridge University Press (CUP)
                0043-9339
                1743-4777
                September 2010
                August 27 2010
                September 2010
                : 66
                : 03
                : 433-440
                Article
                10.1017/S0043933910000516
                a33a612d-18d5-4da9-96fc-3a910474a163
                © 2010
                History

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