La. Admin. Code tit. 7 § XXI-725

Current through Register Vol. 50, No. 11, November 20, 2024

Section XXI-725 - Establishing the Official Tests for Brucellosis in Cattle (Formerly Section 321)

A. Screening Test

1. Milk Ring Test (BRT). This test is conducted by the state-federal laboratory on a composite sample of milk collected at dairy farms. A follow-up individual serological test shall be conducted on all cattle represented in a composite sample which reacts to the test.

a. A commercial dairy herd that has passed four consecutive, negative milk ring tests within the last 12 months, the tests being no less than two months or more than four months apart, will be considered a negative herd and will not be required to be blood tested as long as the herd continues to have milk ring tests four times each year, the tests being no less than two months or more than four months apart, and the results of the tests remain negative.

b. A commercial dairy herd showing a positive milk ring test will be considered Brucellosis infected and will be quarantined and blood tested. The Brucellosis status of the herd will then be determined by the results of the blood test which shall be conducted within 30 days of official notification.

2. Card Test. This test will be used by approved personnel to classify cattle negative on surveillance samples collected at slaughter or at livestock auction markets on routine samples collected on farms and on tests of suspicious and infected herds. Positive samples from Brucellosis vaccinated animals will be given supplemental testing when possible to aid in classification of cattle as reactors.

B. Supplemental Tests

1. Standard Plate Agglutination Test. This test may classify as negative, suspect or reactors.

2. Rivanol Test. This test may classify cattle as negative or reactor.

3. Complement Fixation Test. This test may classify cattle as negative, suspect or reactor.

4. Particle Concentration Fluorescence Immunoassay Test (PCFlA). This test may classify as negative, suspect, or reactor.

5. Concentration Immunoassay Technology Test (CITE). This test may classify as negative or reactor.

6. Any test officially approved by the USDA and recommended by the state veterinarian and the designated epidemiologist.

La. Admin. Code tit. 7, § XXI-725

Promulgated by the Department of Agriculture, Livestock Sanitary Board, LR 11:240 (March 1985), amended LR 11:615 (June 1985), amended by the Department of Agriculture and Forestry, Livestock Sanitary Board, LR 18:836 (August 1992), repromulgated by the Department of Agriculture and Forestry, Office of Animal Health and Food Safety and the Board of Animal Health, LR 40:953 (May 2014).

AUTHORITY NOTE: Promulgated in accordance with R.S. 3:2221 and R.S. 3:2093.