Any person, firm or corporation engaged in the growing of swine that are to be used or disposed of elsewhere than on the premises where such swine are grown shall register with the Commissioner of Agriculture on forms furnished by the commissioner. The commissioner may make orders and adopt regulations, in accordance with the provisions of chapter 54, concerning examination, quarantine, disinfection, preventive treatment, disposition, transportation, importation, feeding and sanitation for the protection of swine from contagious and infectious disease. Said commissioner shall, at once, cause an investigation of all cases of such diseases coming to the commissioner’s knowledge and shall use all proper means to exterminate and prevent spread of the same. Instructions shall be issued, in writing, by the commissioner or the commissioner’s agent that shall contain directions for quarantine and disinfection of the premises where such disease exists. No swine shall be brought into Connecticut by any individual, corporation or common carrier, unless the same originate from a herd that is validated as brucellosis-free and qualified pseudorabies-negative, and are accompanied by a permit issued by the commissioner and an official health certificate showing such animals to be free from any contagious or infectious disease, except that swine brought into this state for the purpose of immediate slaughter upon premises where federal inspection is maintained need not be accompanied by an official health certificate and the owner of each establishment where federal inspection is maintained shall report weekly to the commissioner, upon forms furnished by the commissioner, the number of such swine imported. Such permit shall accompany all waybills or, if animals are driven or carted over highways, shall be in the possession of the person in charge of swine. In addition to any other requirements of this section, all swine imported for other than immediate slaughter that are over three months of age, other than barrows, shall be negative as to a blood test for brucellosis and pseudorabies within thirty days of importation. With approval of the State Veterinarian, a thirty-day blood test may not be required for swine originating from, and residing for at least thirty days prior to importation in, a state that is validated as brucellosis-free and stage V pseudorabies-free, or for swine originating from any herd which the State Veterinarian determines to be pathogen-free. With such approval, swine may be imported pursuant to an import permit and a current official health certificate. All swine brought into the state for immediate slaughter shall be killed in an approved slaughterhouse under veterinary inspection.