Livestock are important in supporting the livelihoods of livestock keepers, consumers, trades and labourers throughout the world. Diseases affecting livestock can have a significant impact on animal productivity and production, on trade in live animal productivity and production, on trade in live animals, meat ant other animal products, on human health (diseases transmissible from animal to humans), and, consequently, on the overall process of economic development.
Many of human pathogens have a animal reservoir, and are termed zoonoses, but they do not necessarily cause disease in the animal. Some of these pathogens can caused foodborne disease (e.g. E. coli O157 : H7, Campylobacter jejuni, Salmonella Typhimurium, Listeria monocytogenes, Mycobacterium paratuberculosis, M. bovis, Cryptosporidium parvum, Cyclospora spp. and gastroenteric viruses). Others zoonoses like rabies, SARS, antrax etc. have different routes of transmission.
The recent epidemic of SARS demonstrates the global importance of zoonoses and the important role of Veterinary Services in the prevention, detection, diagnosis, surveillance, response and research activities. New molecular, microscopical and ELISA methods are developed for rapid detection of these human and animal pathogens.
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