166D.7  Noninfected herds.

In administering the pseudorabies eradication program, the department shall regulate noninfected herds as follows:

1.  A qualified negative herd must be certified, recertified, and maintained as follows:

a.  The herd shall be certified when all breeding swine have reacted negatively to a test. The herd must have been free from infection for thirty days prior to testing. At least ninety percent of swine in the herd must have been on the premises as a part of the herd for at least sixty days prior to testing, or swine in the herd must have been moved directly from another qualified negative herd. To remain certified, the herd must be retested and recertified as provided by the department. The herd shall be recertified when each month the greater of five head of swine or at least ten percent of the herd's breeding swine react negatively to a test.

b.  Before being added to the herd new swine including swine returning to the herd after contact with nonherd swine, shall be isolated until the new swine react negatively to a test conducted thirty days or more after the swine has been placed in isolation. Swine from a herd of unknown status must react negatively to a test not more than thirty days prior to movement from the herd of unknown status and retested in isolation at least thirty days after movement onto the premises where the qualified negative herd is located.

c.  Swine from another qualified negative herd may be added without isolation or testing.

d.  The owner shall make a request to the department for approval or reapproval of a qualified negative herd when the required tests are completed. Upon satisfactory proof that all requirements have been met, the herd shall be recertified by the department.

2.  A controlled vaccinated herd shall be recognized as a noninfected herd until July 1, 1991. A controlled vaccinated herd shall be initially certified, recertified, and maintained as follows:

a.  The herd shall be certified when all breeding swine react negatively to a test and are vaccinated with a licensed pseudorabies vaccine within fifteen days after the test. At least ninety percent of the swine in the herd must have been on the premises as part of the herd for at least sixty days prior to testing, or swine in the controlled vaccinated herd must have been directly moved from a qualified negative herd.

b.  To remain certified the herd must be retested and recertified as provided by the department each three months. The herd shall be recertified after the number of the herd's progeny over four months of age equal to at least twenty-five percent of the breeding herd react negatively to the test every eighty to one hundred five days.

c.  Before being added to the herd new swine must react negatively within thirty days prior to movement, and be vaccinated with a licensed pseudorabies vaccine within fifteen days after the test. The new swine must be added to the herd within thirty days after the test.

3.  A monitored herd shall be initially certified, recertified, and maintained as follows:

a.  The herd shall be certified when a statistical sampling of the herd is determined to be noninfected.

b.  To remain certified the herd must be retested and recertified as provided by the department. The herd must be recertified annually. The herd shall be recertified when a statistical sampling of the herd is determined to be noninfected within twelve months from initial certification or the most recent recertification.

c.  A monitored herd may receive new swine into the herd from a noninfected herd.

4.  A qualified differentiable negative herd shall be certified, recertified, and maintained as follows:

a.  The herd shall be certified when one hundred percent of breeding swine have reacted negatively to a test. The herd must have been free from infection for thirty days prior to testing. At least ninety percent of swine in the herd must have been on the premises as a part of the herd for at least sixty days prior to testing, or swine in the herd must have been moved directly from a qualified negative or qualified differentiable negative herd. A differentiable vaccine must be administered at intervals in accordance with the package insert for that vaccine. To remain certified, the herd must be retested and recertified as provided by the department. The herd shall be recertified when either of the following occurs:

(1)  Each eighty to one hundred five days at least twenty-five percent of the herd's breeding swine react negatively to a test.

(2)  Each month at least ten percent of the herd's breeding swine react negatively to a test.

b.  Before adding to the herd new swine, including swine returning to the herd after contact with nonherd swine, the herd shall be isolated until the new swine react negatively to a test conducted thirty days or more after the swine have been placed in isolation. Swine from a herd of unknown status must react negatively to a test not more than fifteen days prior to movement from the herd of unknown status and retested in isolation at least thirty days after movement onto the premises where the qualified differentiable negative herd is located.

c.  Swine from a qualified negative or qualified differentiable negative herd may be added without isolation or testing.

d.  The owner shall make a request to the department for certification or recertification of a qualified differentiable negative herd when the required tests are completed. Upon satisfactory proof that all requirements have been met, the herd shall be recertified by the department.

Section History: Recent form

  89 Acts, ch 280, §7; 90 Acts, ch 1091, § 5; 98 Acts, ch 1056, §4

Internal References

  Referred to in § 166D.10


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