Ky. State Vet's Office Communiqué, May 16

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Following is a statement sent to other State Veterinarians on May 16, 2001

SUBJECT: Mare Reproductive Loss Syndrome

Dr. Don Notter, Kentucky State Veterinarian, has asked that I provide to you the latest information regarding what has now been named "Mare Reproductive Loss Syndrome" (MRLS) occurring in Kentucky's equine population.

Dr. Lenn Harrison, director of the Livestock Disease Diagnostic Center in Lexington, reports: As of noon on Tuesday, May 15, a total of 26 additional aborted/stillborn equine fetuses/foals (18 late-term and 8 early-term) had been submitted for diagnostic testing/evaluation. The total number of submissions as of this count since April 28, 2001, is 468.

A summary of each day's submissions can be found on the Internet at http://www.uky.edu/Agriculture/VetScience/mrls/.

The investigation continues to focus upon the primary priority of determining the cause of Mare Reproductive Loss Syndrome. As of last night, the investigative teams are concentrating upon insults to pasture as the primary target including:

1) ergot alkaloids produced by fungi;
2) several mycotoxins, including but not limited to zearalenone;
3) phyto estrogens; as well as
4) other compounds in the pasture grasses.

The epidemiological survey team has been expanded to include three USDA veterinarians. A second farm survey is being developed for data collection and analysis. In addition, this team will aid in analysis of data collected from the UK Livestock Disease Diagnostic Center. The epidemiological survey will be designed to take a thorough look at numerous issues. The farms to be surveyed will include both infected and non-infected farms.

The Kentucky Association of Equine Practitioners has released suggestions, based on scientific and diagnostic results available to date, for veterinarians to discuss with their clients. You can view these suggestions over the Internet.

This is but a summary of information available over the Internet. You can find links to the most current information regarding the investigation at www.kyagr.com.

Dr. Notter asked that I convey to each of you his appreciation of the support offered. We are continuing to get new information daily and will keep you apprised.

E.S. Rusty Ford
Equine Programs Manager

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