Texas Agriculture Code - AGRIC § 163.064. Testing and Vaccination

(a) Only a person approved by the commission may perform testing and vaccinating for brucellosis, regardless of whether the person is a veterinarian.

(b) The commission by rule shall prescribe criteria for classifying cattle as negative, infected with brucellosis, or suspected of being infected with brucellosis.  Each classification must be based on the testing of cattle.  The testing may include serological testing, microbiological culturing of blood, tissue, secretions, or excretions, or both.

(c) The commission may by rule regulate and require the vaccination of female cattle within all or any of the area classifications.  Among other rules, the commission may adopt rules providing for:

(d) The commission by rule may regulate the sale and use of brucellosis antigens and vaccines.  A person may not sell a brucellosis antigen or vaccine unless the antigen or vaccine is approved by the commission.  A person may not administer a brucellosis antigen or vaccine unless the antigen or vaccine is approved by the commission and the person is authorized by the commission to administer the antigen or vaccine.