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Although the eradication of brucellosis from cattle in the United States is nearly complete , Brucella abortus is prevalent in bison and elk in the Greater Yellowstone area , and these animals serve as reservoirs that could reinfect domestic livestock . The convention exhibition will feature nearly 300 companies showcasing products and services from hearing aid manufacturers and innovative amplification systems to rehabilitation centers and new technologies for speech and language development in children and adults . Notes : These fees assume students undertaking all courses with GSSD Program at standard course rates which apply to nearly all GSSD-taught courses . Just before I arrive I discover that it has a population of nearly four million .