Section 115.40  Requirements for Establishing and Maintaining Qualified Pseudorabies Negative Herds

a)         Initial Requirements:

1)         Herds which are not under quarantine for pseudorabies shall be initially qualified upon completion of one negative herd test of all breeding swine 6 months of age and over plus a number of progeny equal to 20 percent of the breeding swine population of the herd.  Progeny shall be randomly selected from the swine between 4 and 6 months of age.

2)         A minimum of 90 percent of the herd shall have been on the premises for at least 60 days OR shall have originated direct from another qualified pseudorabies negative herd.

3)         If positive swine are disclosed in a herd in the process of becoming a qualified pseudorabies negative herd, the positive animals shall be immediately isolated from the remainder  of the herd and be disposed of for slaughter OR be maintained on another premises separate and apart from that where the negative swine are maintained.  The herd shall then be recognized as a qualified pseudorabies negative herd when it has complied with the provisions of Section 115.40(a)(1).

4)         A qualified pseudorabies negative herd may be established without a complete herd test if all the swine originate from qualified pseudorabies negative herds and, within 21-45 days after arrival, all swine in the initial shipment (up to 50 animals) are tested and found negative.

b)         Maintenance Requirements:

1)         Qualified pseudorabies negative herd status is maintained by subjecting all swine over 6 months of age in the herd to an official pseudorabies serologic test at least once each year (this shall be accomplished by testing 20 percent of swine 6 months of age and over and a number of offspring 4 to 6 months of age located on the same premises as the breeding herd equal to 6 percent of the breeding animals in the herd every 80 to 105 days and finding all swine so tested negative, or by testing 7 percent of all breeding swine 6 months of age or older, and a test of the offspring 4 to 6 months of age located on the same premises equal to 2 percent of the breeding animals in the herd each month and finding all swine so tested negative). If the members of the qualified herd are maintained on more than one premises, 20 percent plus progeny or 7 percent plus progeny of the swine on each premises shall be retested as required. If the retests are not conducted when due, the requalification requirements shall then be the same as for initial qualification. Upon approval from the Director, status may also be maintained on the basis of a monthly negative official random-sample test (95/5) in each separate population of breeding swine on a premises, and a monthly test of 50 offspring 4 to 6 months of age located on the same premises as the breeding herd. Sampling in the population must be random, and the test protocol in the herd must be part of the approval. Progeny must be selected at random from all groups on the premises.

2)         If positive swine are disclosed on a requalification test, or on a test for any other purpose, the positive swine shall be immediately isolated from the remainder of the herd and be disposed of for slaughter OR maintained on another premises separate and apart from that where the negative swine are maintained.  The infected premises or portions thereof shall be cleaned and disinfected.  Such herd may again be recognized as a qualified pseudorabies negative herd upon completion of a negative herd test of all swine in the herd 6 months of age and over and an official random-sample test (95/10) of progeny 2-6 months of age conducted not less than 30 days after the last infected swine have been removed and the premises cleaned and disinfected.

c)         Additions:

1)         Swine originating in another qualified pseudorabies negative herd may enter Illinois qualified pseudorabies negative herd without test.

2)         Swine originating from other than a qualified pseudorabies negative herd shall be negative to an official test for pseudorabies conducted not more than 30 days prior to entry into the herd, shall be held in isolation from the other members of the qualified herd, and shall be retested and negative to an official test for pseudorabies not less than 30 nor more than 60 days following entry.

3)         Members of a qualified pseudorabies negative herd which are exhibited or are otherwise commingled with swine from non-qualified pseudorabies negative herds shall be held in isolation on the herd premises for a minimum of 30 days after return AND shall be tested and negative to an official test for pseudorabies before being reunited with other members of the qualified herd.

d)         Establishing and maintaining a qualified pseudorabies negative growout premises on which no adult breeding swine are maintained.

1)         In herds where the pigs are moved within one week after weaning from a pseudorabies negative herd to either a growout or sales point, a pseudorabies test is not required.

2)         Pseudorabies negative status may be attained in the growout facility by a monthly negative random-sample test (95/5) beginning within 30 days after the establishment of the herd, except that in all-in/all-out units, one test of 50 head is required of each group.  If the breeding herd, growout and sales point herd are all located in Illinois, testing is not required.

3)         Pseudorabies negative status is attained in the sales point herd by a negative official pseudorabies test of the entire initial shipment or 50 head selected at random, whichever is less.  Pseudorabies negative status may be maintained by a monthly negative official pseudorabies test of 50 swine selected at random from those that have been in the herd at least 30 days, except that in all-in/all-out units, one test of 50 head is required of each group.  Each segregated group of swine on an individual premises must be considered a separate herd.

(Source:  Amended at 23 Ill. Reg. 434, effective January 1, 1999)