As soon as possible after receipt of an application, the commissioner or some competent veterinarian in his employ shall make a thorough physical examination of such animals, and may subject them to the tuberculin, mallein or other approved test, and if any of the animals react to the test so made, or upon physical examination are found to be infected with a contagious or infectious disease, they shall be condemned and slaughtered after appraisal, or held in strict quarantine as provided for by this chapter in the case of registered purebred tuberculous bovines. After slaughter, the carcasses shall be disposed of as provided under N.H. Rev. Stat. § 436:17.