Abstract: Disclosed is a novel means which makes it possible to steadily mass-produce knockout individuals even in large animals. The method of the present invention is a method for producing a non-human large mammal or fish (non-human animal) that produces gametes originating in a different individual, and comprises transplanting at least one pluripotent cell derived from a second non-human animal into an embryo derived from a first non-human animal, said embryo being at a cleavage stage and having a genome in which a function of nanos3 gene is inhibited, to prepare a chimeric embryo, and allowing said chimeric embryo to develop into an individual.

Abstract: Disclosed is novel means that enables collection of embryos from the uterus of a living livestock animal, especially cattle, easily in a short time with the same accuracy as that achieved by a skilled technician. A livestock embryo collection apparatus of the present invention comprises: two syringes; a liquid transfer line for connecting a perfusate supply section-a syringe I-a balloon catheter-a syringe II-an embryo collection section; a liquid transfer direction control section for controlling the direction of transfer of a perfusate in the liquid transfer line; and a syringe pump control section for controlling pump operation of the two syringes.

Abstract: Disclosed is a vaccine for non-human animals, which vaccine enables effective immune induction in non-human animals such as livestock or poultry. The vaccine for non-human animals of the present invention comprises liposomes each comprising an antigen molecule(s) bound to the surface thereof, the antigen molecule(s) being derived from a pathogen infectious to the non-human animals. The non-human animals are, for example, livestock or poultry. One most preferred example of the vaccine according to the present invention is an infectious bronchitis virus (IBV) vaccine, which is effective against various isolated IBV strains, and which is expected to be sufficiently applicable even to cases where a mutant strain appeared. Another preferred example of the vaccine according to the present invention is a PRRSV vaccine, which was confirmed to have an effect that reduces fever, lung lesion development, and the like caused by the infection.

Abstract: Disclosed is a novel means which enables satisfactory preservation of embryos and fertilized eggs in the non-frozen state for a longer period than conventional means, which novel means also achieves high hatching ability and a high conception rate of the embryos after the preservation. The method for preserving a mammalian embryo(s) or fertilized egg(s) of the present invention comprises immersing a mammalian embryo(s) or fertilized egg(s) in a medium containing 20 to 80% (v/v) serum and 10 to 100 mM Good's buffer, and storing the embryo(s) or fertilized egg(s) at non-freezing low temperature. The preservative solution for a mammalian embryo(s) or fertilized egg(s) of the present invention essentially consists of a medium containing 20 to 80% (v/v) serum and 10 to 100 mM Good's buffer. The Good's buffer is preferably HEPES.

Abstract: The present invention discloses a novel means capable of producing a blood chimeric animal in which a state of retaining blood cells originating in a heterologous animal, such as a human, at a high percentage is sustained for a long period of time, even in cases where a medium to large domestic animal is used as a recipient. The method for producing a non-human animal that retains blood cells originating in a heterologous animal, according to the present invention, comprises transplanting hematopoietic cells of a heterologous animal into a non-human animal, in which hematopoietic cells the function of a gene that acts on the hematopoietic system is modified. The gene that acts on the hematopoietic system is, for example, Lnk gene.

Abstract: Disclosed is a novel means which makes it possible to steadily mass-produce knockout individuals even in large animals. The method of the present invention is a method for producing a non-human large mammal or fish (non-human animal) that produces gametes originating in a different individual, and comprises transplanting at least one pluripotent cell derived from a second non-human animal into an embryo derived from a first non-human animal, said embryo being at a cleavage stage and having a genome in which a function of nanos3 gene is inhibited, to prepare a chimeric embryo, and allowing said chimeric embryo to develop into an individual. When a pluripotent cell having a genome in which a desired gene is knocked out is used as the pluripotent cell derived from the second non-human animal, the first non-human animal capable of producing germ cells in which the desired gene is knocked out is obtained, and therefore knockout non-human animals can easily be mass-produced by mating such non-human animals.

Abstract: An injector for injecting a fertilized ovum(ova) or a sperm(s) for artificial insemination into a uterine body, by which an injection pipe can be introduced smoothly into a uterus, is disclosed. An injector for a fertilized ovum(ova) or a sperm(s) of the invention is characterized in that it comprises a guide pipe for insertion into a uterine body, an injection pipe which is inserted into the guide pipe and has a length longer than the guide pipe, and a nozzle connected to a frontal end of the injection pipe, wherein the injection pipe comprises a flexible 1st pipe section constituting a frontal side of the injection pipe, and a 2nd pipe section being more rigid than the 1st pipe section and constituting a rear side of the injection pipe.

Abstract: Disclosed is a novel means which enables satisfactory preservation of embryos and fertilized eggs in the non-frozen state for a longer period than conventional means, which novel means also achieves high hatching ability and a high conception rate of the embryos after the preservation. The method for preserving a mammalian embryo(s) or fertilized egg(s) of the present invention comprises immersing a mammalian embryo(s) or fertilized egg(s) in a medium containing 20 to 80% (v/v) serum and 10 to 100 mM Good's buffer, and storing the embryo(s) or fertilized egg(s) at non-freezing low temperature. The preservative solution for a mammalian embryo(s) or fertilized egg(s) of the present invention essentially consists of a medium containing 20 to 80% (v/v) serum and 10 to 100 mM Good's buffer. The Good's buffer is preferably HEPES.

Abstract: An injector for injecting a fertilized ovum(ova) or a sperm(s) for artificial insemination into a uterine body, by which an injection pipe can be introduced smoothly into a uterus, is disclosed. An injector for a fertilized ovum(ova) or a sperm(s) of the invention is characterized in that it comprises a guide pipe for insertion into a uterine body, an injection pipe which is inserted into the guide pipe and has a length longer than the guide pipe, and a nozzle connected to a frontal end of the injection pipe, wherein the injection pipe comprises a flexible 1st pipe section constituting a frontal side of the injection pipe, and a 2nd pipe section being more rigid than the 1st pipe section and constituting a rear side of the injection pipe.

Abstract: The present invention provides a feed for poultry for increasing the egg weight in the early period of egg-laying by laying hens and preventing the decline of egg weight in the summer season. Feed containing soybean germs or defatted soybean germs is given (to the hens).

Abstract: A method for freezing bovine embryos which comprises adding a dextran and supplemented calf serum to bovine embryos, and freezing the resulting mixture.

Abstract: A method for freezing bovine embryos with a composition which includes 4% ethylene glycol and 4% propanediol and in addition 4% bovine serum albumin containing a high lipid content is disclosed. The mixture is subjected to freezing and used in a method for reproducing cattle by transferring to a cow recipient directly after thawing the preserved embryos. Further, a high lipid content is disclosed as 2.5 ug or more of lipid/mg of bovine serum albumin. The bovine embryos are obtained by in vivo fertilization or by in vitro fertilization for use in the disclosed methods.

Abstract: A method and composition for increasing body weight and stimulating the immune systems of domestic animals, poultry and fish are disclosed. In the method of the present invention, bacterial and yeast cells from which capsules have been removed are given to the domestic animals, poultry or fish.

Abstract: A method of enhancing the ability of cattle and swine to resist diseases caused by microorganisms which comprises the steps of adding an antimicrobial effective amount in a range of 0.01 to 0.2% by weight of bile powder to a livestock feed and administering the livestock feed prepared to the cattle and swine. The method may also comprise adding a pharmaceutical effective amount of one of the following: licorice, garlic or quillaja powders or extracts thereof to the livestock feed.