Reduced virulence of Serpulina hyodysenteriae hemolysin-negative mutants in pigs and their potential to protect pigs against challenge with a virulent strain. [electronic resource]
Producer: 19940623Description: 2244-8 p. digitalISSN:- 0019-9567
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Publication Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.
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