NEW MEXICO HORSE BREEDERS EVA GUIDELINES

Stallions               Vaccinate annually – mandatory

                              *must have serological blood test prior to first vaccination

                              *if subsequent annual vaccination was not done, second inoculation can be done 1 year

                                or 2 years later without serological evaluation

                              *not necessary to isolate vaccinated stallion after first inoculation

                              *report all stallion inoculations for EVA to NMHBA

                              *keep records of all vaccinations – stamp papers of original vaccination

Mares                  *Dr Peter Timoney of Cluck Research Center in Lexington, Kentucky suggests that the

                                mare population continue to be vaccinated for another two to three years

                              *this is a precautionary measure to insure there is not a recurrence of the disease. It is

                                not mandatory and it is a discretionary decision on the part of each breeding

                                establishment

                              *nurse mares must be vaccinated as well as all teaser stallions

                              *vaccinating pregnant mares in the last trimester for the first time there may be an

                                Occasional abortion

                              *mares previously vaccinated do not need to be isolated from the population at the

                                time of vaccination

Foals                     All foals under weaning age do not require vaccinations

Yearlings             Again it is the recommendation of Dr. Timoney that all yearlings be vaccinated for the

                              first time in which a prior serological test is not necessary. He highly recommends that

                              all intact males be vaccinated and recorded for future reference. I suggest that you have

                              the papers stamped or noted that this colt has been vaccinated dated and recorded in

                              the event that a later date he may enter the breeding shed.

Summary            The presence of the infection of EVA to the extent we are not aware of has been

                              controlled at this point. However it is essential that we keep the stallion population

                              vaccinated on an annual basis. It is recommended that we continue to vaccinate the

                              mare population for at least two more years to ensure full protection. In summary it is

                              vital to keep the stallions vaccinated annually. Any stallion entering the breeding shed

                              for the first time should be tested for the presence of the EVA virus regardless of the

                              vaccination history.

                              *New Mexico has 375 active stallions of which approximately 100 have not complied

                                with the mandate of NMLB. Granted that the majority of these are not commercial

                                breeders and have chosen not to vaccinate. Hopefully with the help of the NMLB we

                                can entice the stallion owners to cooperate with the rest of us to further control this

                                disease.

Report to the NMHB at the annual convention on 1-28-09 Leonard P. Blach (623-9119)

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