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The efficacy of an oral DNA vaccine carrying the Eimeria tenella 5401 antigen gene delivered by attenuated Salmonella typhimurium was examined in an experimental challenge study. The DNA vaccine preparation was made by transforming the recombinant plasmid pcDNA3-5401 into the attenuated S. typhimurium strain (Dam − and PhoP − ) (designated hereafter as ZJ111/pcDNA3-5401). The chickens...
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