Unless otherwise indicated by the context, when used in sections 267.470 to 267.550, the following terms have the following meanings:

1. (1) "Accredited approved veterinarian" means a veterinarian who has been accredited by the United States Department of Agriculture and approved by the state department of agriculture and who is duly licensed under the laws of Missouri to engage in the practice of veterinary medicine, or a veterinarian domiciled and practicing veterinary medicine in a state other than Missouri, duly licensed under the laws of the state in which he resides, accredited by the United States Department of Agriculture, and approved by the chief livestock sanitary official of that state;
2. (2) "Animal" means an animal of the bovine species;
3. (3) "Approved vaccine" or "vaccine" means vaccine containing brucella microorganisms produced under license of the United States Department of Agriculture and approved by the department for the immunization of animals against brucellosis;
4. (4) "Bovine brucellosis" or "brucellosis" means the disease wherein an animal of the bovine species is infected with brucella microorganisms, irrespective of the occurrence or absence of clinical symptoms of the disease;
5. (5) "Cattle" means animals of the bovine species;
6. (6) "Certified brucellosis free herd" means a herd of cattle which has met the requirements and conditions set forth in sections 267.470 to 267.550 for such status, or a herd of cattle in another state which has met those minimum requirements and conditions under the supervision of the livestock sanitary authority of the state in which said cattle are domiciled and as recommended by the United States Department of Agriculture for such status;
7. (7) "Commercial feeder" means any person, association, partnership or corporation maintaining premises wherein cattle of various classes are held for various feeding periods and after such period are moved to a recognized and approved slaughtering establishment or consigned to a public stockyards market under federal inspection service or a licensed market approved for the handling of such cattle and are sold for slaughter purposes only;
8. (8) "Department" or "department of agriculture" means the department of agriculture of the state of Missouri, and when by this law the said department of agriculture is charged to perform a duty it shall be understood to authorize the performance of such duty by the director of the department of agriculture of the state of Missouri or his duly authorized deputies, acting under the supervision of the director of the department of agriculture;
9. (9) "Infected animal" or "reactor" means an animal which has shown a positive reaction to the agglutination test or any other recognized test for the detection of bovine brucellosis approved by the department or if "brucella organisms" are found in the body discharges or secretions of such animal or when a previous abortion history of the animal justifies designating such animal as a reactor, with or without a positive reaction to the test;
10. (10) "Isolated" or "isolation" means the condition in which cattle are quarantined to a certain designated premise and maintained separately and apart from any other cattle on the premise or from cattle on adjacent premises;
11. (11) "Livestock sale or market" means a sale or market as defined in and licensed under chapter 277, RSMo;
12. (12) "Milk ring test" means a test made by using the standardized suspension of milk ring test antigen of killed brucella microorganisms in combination with proper amounts of whole milk or cream produced by a particular herd of cattle;
13. (13) "Modified certified brucellosis free area" means an area which has met the requirements and conditions set forth in sections 267.470 to 267.550 for such status, or an area in another state which has met those minimum requirements and conditions under the supervision of the livestock sanitary authority of the state in which such area is located and as recommended by the United States Department of Agriculture for such status;
14. (14) "Plan A" means test-and-slaughter, with or without calfhood vaccination, under provisions of the law;
15. (15) "Plan B" means testing and calfhood vaccination, with temporary retention of reactors for not longer than three years and until they can be disposed of for slaughter, under provisions of the law;
16. (16) "Plan C" means calfhood vaccination without test of any part of the herd and the plan is confined to those herds in which movement of animals is restricted to special permits issued by the department;
17. (17) "Plan D" means adult vaccination to be practiced in cases of emergency, with the approval of the department;
18. (18) "Public stockyards" means any public stockyards located within the state of Missouri and subject to regulations under the provisions of the Packers and Stockyards Act enacted by Congress of the United States;
19. (19) "Quarantine" means the condition in which cattle or other species of animals are restricted in movement and to a particular premise under such terms and conditions as may be designated in the order by the department;
20. (20) "Test for brucellosis" means a test recognized by the United States Department of Agriculture in the diagnosis of brucellosis.

(L. 1955 p. 5 § 267.265, A.L. 1961 p. 19, A.L. 1965 p. 95, A.L. 1973 S.B. 291)