Abstract: Disclosed are a guardian information-based animal integrated management server and an animal integrated management method thereof.

Abstract: The present disclosure relates to a novel citrate synthase variant, a microorganism comprising the variant, and a method for producing O-acetyl-L-homoserine and L-methionine using the microorganism.

Abstract: A guardian information-based animal integrated management server is proposed. The server may include a guardian information receiver receiving guardian information including at least one of a name, address, birth date, and sex of a guardian, and an animal receiver receiving animal information including at least one of a type, sex, photograph, and birth date of an animal corresponding to the guardian. The server may also include an electronic gift certificate providing processor providing an electronic gift certificate including at least one of a medical treatment and vaccination for the animal. The server may further include a medical treatment information receiver receiving medical treatment information regarding at least one of a medical treatment, surgery, vaccination, and prescription for the animal, and a medical treatment history managing processor matching a medical treatment history of the animal with the guardian information according to the received medical treatment information, and managing same.