NAC584.4561. Brucellosis.

     1. All animals in a herd, and any additions to the herd, must be free from brucellosis before any milk from the herd may be sold.

     2. Freedom from brucellosis is evidenced by a satisfactory blood serum test for agglutinins against brucella abortus, or by three successive satisfactory ring tests at intervals not less than 3 months or more than 6 months, or by other tests approved by the United States Department of Agriculture or the Division of Animal Industry of the Department. The tests must be made and any reactors found must be removed from the milking herds and disposed of by approved methods of the agencies.

     3. Herds that use blood agglutination tests must be tested at least once every 12 months. If the herd is to be tested by the ring test, this must be accomplished at intervals of not more than 6 months. Negative ring tests of the milk supply are considered as satisfactory compliance with this section.

     4. A positive ring test of the milk supply requires a blood test of the entire herd, and a negative blood test of that herd must eventually be accomplished. After a reactor has been found in a herd, that herd must be retested by blood agglutinins until a negative test of the complete herd indicates complete freedom from brucella infection.

     5. Hoofed mammals which are part of a herd officially vaccinated as young mammals and which react to the blood agglutination test must be referred to the veterinarian supervising that herd for his or her written recommendation regarding such tests.

     6. This testing is not required in brucellosis free counties that used the brucellosis free system approved by the United States Department of Agriculture or the Division of Animal Industry of the Department.

     [Bd. of Health, Grading of Milk Reg. § 11.2, eff. 7-4-72]—(NAC A by Dairy Comm’n by R151-01, 12-17-2001, eff. 1-1-2002; R082-11, 5-30-2012)