Abstract: The present invention provides a bacterin comprising at least two virulent Mycoplasma bovis isolates of differing biotypes, in an amount sufficient to immunize a calf or cow against infection by Mycoplasma bovis, an adjuvant, and a pharmaceutically acceptable carrier. Further provided is a method of producing the bacterin of the present invention. Finally, the present invention also provides a method of immunizing a calf or cow against Mycoplasma bovis infection, especially infection associated with BRD, comprising administering to the calf or cow a dose of a bacterin made according to the present invention in an amount effective to elicit a protective response in the animal, as evidenced by a decrease in the mortality and morbidity associated with natural infection.

Abstract: The present invention provides a bacterin comprising at least two virulent Mycoplasma bovis isolates of differing biotypes, in an amount sufficient to immunize a calf or cow against infection by Mycoplasma bovis, an adjuvant, and a pharmaceutically acceptable carrier. Further provided is a method of producing the bacterin of the present invention. Finally, the present invention also provides a method of immunizing a calf or cow against Mycoplasma bovis infection, especially infection associated with BRD, comprising administering to the calf or cow a dose of a bacterin made according to the present invention in an amount effective to elicit a protective response in the animal, as evidenced by a decrease in the mortality and morbidity associated with natural infection.

Abstract: A method of producing an anabolic response in animals has been discovered. The method is administering an anabolically effective amount of O,O-diethyl, O-3,5,6-trichloro-2-pyridyl phosphorothioate; O,O-dimethyl, O-3,5,6-trichloro-2-pyridyl phosphorothioate; physiologically acceptable salts or combinations of the above named compounds to animals. The anabolic response produced is exhibited in one or more of the following ways:(a) increased growth rate,(b) increased milk production,(c) increased protein content,(d) improved reproductive performance,(e) increased fiber production, and(f) improved feed conversion efficiency in animals.Also claimed are feed compositions containing the above named compounds.