Abstract: The present inventions relates to a method of increasing beef production in cattle with feed additives, comprising feeding cattle with feed, comprising an effective amount of an ionophore in combination with a macrolide antibiotic, and thereafter feeding cattle with feed, comprising zilpaterol and essentially no ionophore or macrolide antibiotic for the succeeding about 20 to 40 days.

Abstract: The invention relates to vaccine against infectious salmon anaemia (ISA) virus, DNA sequences endocing immunogenic proteins from ISA virus, diagnostic kit for detection of ISA specific nucleic acid sequences and proteins and exploitation of the ISA virus genome or parts of it as a general model organism.

Abstract: The present invention relates to hydrophilic Eimeria polypeptides, DNA-fragments encoding those peptides, recombinant DNA molecules comprising such DNA-fragments, live recombinant carriers comprising such DNA-fragments or recombinant DNA molecules and host cells comprising such DNA-fragments, recombinant DNA molecules or live recombinant carriers. Furthermore, the invention relates to antibodies against the polypeptides and to coccidiosis vaccines based upon said polypeptides. The invention also relates to methods for the preparation of such antibodies and vaccines, and to methods for the detection of Eimeria parasites and antibodies against Eimeria parasites.

Abstract: A vaccine for immunizing animals against diseases caused by microorganisms producing an osteolytic toxin is disclosed. The vaccine contains a Pasteurella multocida toxin or derivative thereof that has been rendered non-toxic by genetic and/or biochemical means. The toxin or derivative is encoded by a nucleotide sequence from Pasteurella multocida toxin which is inserted in an expression vector capable of replicating ina suitable host microorganism in which the sequence may be expressed.

Abstract: A vaccine for immunizing animals against diseases caused by microorganisms producing an osteolytic toxin is disclosed. The vaccine contains a Pasteurella multocida toxin or derivative thereof that has been rendered non-toxic by genetic and/or biochemical means. The toxin or derivative is encoded by a nucleotide sequence from Pasteurella multocida toxin which is inserted in an expression vector capable of replicating in a suitable host microorganism in which the sequence may be expressed.