Before I get into the main topic, a general PSA for equine infectious diseases: if you own a horse or spend time at equine facilities, you should sign up for daily alerts from EDCC. They send out a daily email around 5pm Eastern with updates by state/county on known cases of infectious diseases and summaries on new cases. This is their alerts page: https://equinediseasecc.org/alerts and if you scroll to the bottom you can sign up for alerts.
Does anyone have any thoughts on why we’ve been seeing such a crazy amount of EIA cases in the West/Southwest lately? I saw something a couple of weeks ago that it was being spread by people (instead of insects which I believe is the normal vector), but I can’t remember where I saw it.
Two separate cases, both texts from the page I linked above:
The previous three (3) horses that were in quarantine for close exposure on the Orange County premises were re-tested and confirmed positive for EIA. During our ongoing investigation into this case an additional thirty-six (36) potentially exposed horses on the premises, all within the same training group, were tested and two (2) horses in this group were confirmed positive for EIA. A confirmed EIA positive equid must be euthanized or quarantined for life 200 yards away from any EIA negative equid as per USDA EIA program rules. Euthanasia was elected for these five (5) confirmed cases and witnessed on October 16th by CDFA veterinarians. This brings the total number of positives in this cohort to twelve (12) horses in California. Close contact horses to the affected cases deemed potentially exposed, will remain under quarantine until their sixty (60) day retest samples are completed as per CDFA and USDA program requirements.
On September 20th and 24th, the National Veterinary Services Laboratories (NVSL) confirmed equine infectious anemia (EIA)-positive results in 4 Quarter Horse racehorses that were part of a group recently moved from racing in New Mexico to Los Alamitos in California. Several of the EIA-positive horses were showing clinical signs of EIA upon arrival to California. Testing of in-contact horses in California and epidemiologically-linked horses in Texas and New Mexico has yielded an additional 18 EIA-positive horses to date. All 22 EIA-positive horses (12 in CA, 2 in NM, 8 in TX) were racing under the same trainer and attending the same series of sanctioned races in New Mexico in August and September. Additional exposed horses have been identified and are in the process of being tested in multiple states. The current epidemiological investigation indicates that spread of EIA among these horses occurred by iatrogenic transmission. Twenty (20) of the 22 EIA-positive horses have been euthanized, 1 horse remains quarantined in New Mexico, and 1 horse died of the disease. Updates to the current situation will be posted as more information becomes available.
It was a shock to me coming to CA from FL that we don’t require Coggins tests here - that’s pretty much beaten into our heads in FL. Maybe that will become the norm with these new cases? Anyone have any insight on the spread?