The present invention relates to methods for treating or preventing a disease or disorder in an animal caused by infection by Mycoplasma bovis (M. bovis) by administering to the animal an effective amount of a Mycoplasma hyopneumoniae (M. hyo) vaccine. The M. hyo vaccine can be a whole or partial cell inactivated or modified live preparation, a subunit vaccine, or a nucleic acid or DNA vaccine. The M. hyo vaccine administered in accordance with the present invention can be synthesized or recombinantly produced.
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