N.M. Admin. Code § 21.30.7.15

Current through Register Vol. 35, No. 20, October 22, 2024

Section 21.30.7.15 - SERO-POSITIVE NONSHEDDING STALLIONS

A. A stallion may be considered to be a vaccinated sero-positive stallion if a blood sample collected within 10 days prior to administration of an approved vaccine was negative for antibodies against EAV. See 21.30.7.19 NMAC for recommended vaccination protocols.

B. It is required that a sero-positive vaccinated stallion that did not have an EVA negative test prior to vaccination comply with one of the following testing procedures to ensure that the stallion is not at risk of transmitting the virus:

(1) a standard insemination volume (10ml) of semen should be collected and either cultured for EAV or evaluated using a PCR test; or

(2) the stallion should be bred to two mares negative for EAV antibodies; the two mares shall be isolated from other equine for 28 days and have blood collected for an EVA test 28 days after breeding or artificially inseminated from two ejaculates, separately collected;

(3) the sero-positive stallion would be considered a non-shedder if the semen culture, semen PCR or test breeding results are negative.

C. A stallion may be considered a non-vaccinated sero-positive stallion, if the stallion has sero-converted following a natural exposure to the virus. It is recommended that a non-vaccinated sero-positive stallion be tested as outlined below prior to breeding to ensure that he is not at risk of transmitting the virus:

(1) semen should be collected and either cultured for EAV or evaluated using a PCR test; or

(2) the stallion should be bred to two mares negative for EAV antibodies; the two mares shall have blood collected for an EVA test 28 days after breeding or artificially inseminated; the two mares shall remain isolated from other equine for 28 days following breeding;

(3) the sero-positive stallion would be considered a non-shedder if the semen culture, semen PCR or test breeding results are negative.

D. A stallion previously classified as a shedding stallion may be reclassified as a non-shedding stallion if the following criteria are met:

(1) during the first breeding season following the stallion's classification as a non-shedder, the first five sero-negative mares bred or artificially inseminated using semen collected from separate ejaculates from this stallion shall be test negative to a blood sample collected for an EVA test 28 days after breeding or artificial insemination;

(2) during the second breeding season, the stallion shall be bred to two mares negative for EAV antibodies that will be tested 28 days after breeding or have its semen collected and cultured negative for EAV or have the semen tested negative by PCR for EAV; if the semen culture report or PCR test and blood samples are negative for EAV, there shall not be restrictions placed on a future breeding season.

E. The final determination that a stallion is not an EAV shedder shall be made based on scientific procedures described in this section and approved by the state veterinarian. Until this determination is made, the stallion shall be considered an EAV shedder.

N.M. Admin. Code § 21.30.7.15

21.30.7.15 NMAC - N/E, 11/17/06, Adopted by New Mexico Register, Volume XXXV, Issue 13, July 16, 2024, eff. 7/16/2024