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(916) 652-7645

Breaking News

ALERT: Equine Herpes Myeloencephalopathy (EHV-1) San Diego County Feb. 13th, 2017

February 13th, 2017

A 10 year-old Warmblood gelding in San Diego County displaying neurologic signs of urine dribbling and hind limb ataxia was confirmed positive for Equine Herpesvirus -1 by the California Animal Health and Food Safety (CAHFS) Laboratory, the state’s regulatory laboratory. Based on the clinical signs and positive laboratory test, this horse meets the case definition for Equine Herpesvirus Myeloencephalopathy, a condition which requires regulatory action. The neurologic signs were first noted on Tuesday February 7th. The positive horse was stabled in tent 21 at the HITS Show in Thermal, CA from January 21, 2017 to February 5th. The EHM horse and one additional exposed horse have been quarantined at their home premises in San Diego County. CDFA has been in contact with HITS show management and veterinarians to ensure enhanced biosecurity measures are taken on the premises; including cleaning and disinfecting the stabling area. CDFA recommends any exposed horses be observed for clinical signs and have temperatures taken twice daily. CDFA will continue to monitor the situation.

Predicting race elimination in endurance horses

Great new research study from LBEMC and UC Davis. Thanks to the Tevis Cup and all of the riders that made this study possible.

Ability of clinicopathologic variables and clinical examination findings to predict race elimination in endurance horses.

Fielding CL, Meier CA, Fellers GK, Magdesian KG.
as published at: https://www.ncbi.nlm.nih.gov/pubmed/28029292

OBJECTIVE
To compare results of point-of-care laboratory testing with standard veterinary clinical examination findings at a single time point during endurance competition to identify horses at risk for elimination.

ANIMALS
101 endurance horses participating in the 2013 Western States 160-km (100-mile) endurance ride.

PROCEDURES
At the 58-km checkpoint, blood samples were collected from all horses. Samples were analyzed for pH, Pco2, base excess, anion gap, PCV, and whole blood concentrations of sodium, potassium, chloride, total carbon dioxide, BUN, glucose, and bicarbonate. Corrected electrolyte and PCV values were calculated on the basis of plasma total protein concentration. Immediately following the blood sample collection, each horse underwent a clinical examination. In addition to standard examination variables, an adjusted heart rate was calculated on the basis of the variable interval between entry into the checkpoint and heart rate recording. A combination of stepwise logistic regression, classification and regression tree analysis, and generalized additive models was used to identify variables that were associated with overall elimination or each of 3 other elimination categories (metabolic elimination, lameness elimination, and elimination for other reasons).

RESULTS
Corrected whole blood potassium concentration and adjusted heart rate were predictive for overall elimination. Breed, plasma total protein concentration, and attitude were predictive for elimination due to metabolic causes. Whole blood chloride concentration and corrected PCV were predictive for elimination due to lameness. Corrected PCV was predictive for elimination due to other causes.

CONCLUSIONS AND CLINICAL RELEVANCE
Results indicated that for horses in endurance competition, a combination of breed and clinical examination and laboratory variables provided the best prediction of overall elimination.

lbemc-tevis-endurance

Equine Herpes Myeloencephalopathy (EHV) Incident in CA, New UPDATE! Nov. 10th, 2016

November 10th, 2016

At the Los Angeles Equestrian Center, two additional horses were moved to quarantined isolation—one due to elevated temperature with pending EHV-1 test results and the other with elevated temperature and confirmed positive for non-neuropathogenic EHV-1 nasal swab. Nine horses currently reside in quarantined isolation.
The three barns remain under quarantine with enhanced biosecurity and horses’ temperatures are monitored twice daily.
Since issuance of the quarantine on November 3, 2016 a total of six horses displaying neurologic signs have been confirmed positive for Equine Herpesvirus Myelencephalopathy. One of the six horses was euthanized on November 3rd due to the severity of clinical signs. All other confirmed positive horses remain in quarantined isolation and continue to stabilize and show improvement. Four of the six confirmed positive horses participated in a horseshow in Las Vegas, NV on October 24, -29, 2016. At this time, no additional EHV-1 cases have been confirmed in horses that exhibited at the Las Vegas horse show. CDFA has confirmed that the host facility has taken biosecurity measures of thorough cleaning and disinfection of the show facility.

CDFA Animal Health Branch veterinarians continue to monitor the quarantine and situation on-site and will provide additional updates as they become available.

November 7, 2016
At the Los Angeles Equestrian Center, a febrile horse displaying mild neurologic signs has been confirmed positive for the non-neuropathogenic strain of Equine Herpesvirus-1. Since issuance of the quarantine on November 3, 2016 a total of six horses displaying neurologic signs have been confirmed positive for Equine Herpesvirus Myelencephalopathy. One of the six horses was euthanized on November 3rd due to the severity of clinical signs. All other confirmed positive horses remain in isolation and under quarantine. All exposed horses remain under quarantine and temperatures are being taken twice daily. Four of the six confirmed positive horses participated in a horseshow in Las Vegas, NV on October 24, -29, 2016. At this time, no additional EHV-1 cases have been confirmed in horses that exhibited at the Las Vegas horse show. CDFA has confirmed that the host facility has taken biosecurity measures of thorough cleaning and disinfection of the show facility.

CDFA Animal Health Branch veterinarians continue to monitor the quarantine and situation on-site and will provide additional updates as they become available.

November 4, 2016
On November 4, 2016, three additional horses were confirmed positive for the non-neuropathogenic strain of Equine Herpesvirus-1 on the Los Angeles County index premises. Two of the three affected horses display neurologic signs and the third horse is febrile and all three are in isolation. Two of these newly confirmed equine cases attended the Las Vegas horse show last week. At this time, no additional EHV-1 cases have been confirmed in horses that exhibited at the Las Vegas horse show on October 27 – 29, 2016. Exposed horses on the Los Angeles index premises continue to have their temperatures monitored twice daily and enhanced biosecurity measures remain in place. CDFA Animal Health Branch veterinarians continue to monitor the quarantine and situation on-site and will provide additional updates as they become available.

November 3, 2016
On November 3, 2016, a 5 year-old Saddlebred displaying severe neurologic signs and a 10 year-old Saddlebred in Los Angeles County displaying moderate neurologic signs were confirmed positive for the non-neuropathogenic strain Equine Herpesvirus-1 at the California Animal Health and Food Safety Laboratory. Due to severity of clinical signs, the 5 year-old horse was euthanized on November 3, 2016. The Department has issued a quarantine for exposed horses at the facility and has implemented enhanced biosecurity measures. All exposed horses will have temperatures taken twice daily and be observed for clinical signs compatible with EHV.

The two confirmed positive horses, along with six other horses, recently returned from a horse show in Las Vegas, NV from Oct. 27-29, 2016. These horses returned to the California home premises on October 30. Out of an abundance of caution, show management has notified trainers/owners participating in the event to recommend twice daily temperature monitoring and observation of compatible clinical signs.

CDFA Animal Health Branch veterinarians are onsite monitoring the situation and will provide additional updates as they become available.

2016 Equine West Nile Virus (WNV) Update: 9th Confirmed Equine WNV Case

On August 23, 2016, a three month old Andalusian colt in Fresno County, displaying severe neurologic signs was confirmed positive for West Nile Virus (WNV). The colt has died.
For 2016, a total of nine (9) horses have been confirmed positive for WNV. The positive horses are located in the following counties; Fresno(2), Calaveras, Riverside, Sacramento, San Diego, San Joaquin, Sutter and Ventura counties. All horses were not current on their WNV vaccinations. Three of the nine positive confirmed horses died or were euthanized.

CDFA continually monitors and investigates equine neurologic cases for the presence of WNV in California. CDFA urges horse owners to consult their veterinarian concerning a WNV vaccination program to ensure maximum protection of their horses.

Summer is flu season for horses – take precautions!

summer-horse-flu-lbemc

Outbreaks of Equine Influenza have already occurred in our practice area this summer. This viral infection and a similar infection caused by Equine Rhinopneumonitis virus are passed by aerosol transfer between horses but also by fomites such as rags, buckets, trailers, and hands. Prevention by vaccination is important for horses in stables with in and out traffic, in show barns, and for horses in contact with horses going out to shows or other equestrian events. Owners taking horses out for shows or even trail riding should avoid nose-to-nose contact with other horses and also avoid public water tanks.  Vaccination protocols can be found HERE. Horses that are showing signs of influenza or rhinopneumonitis can be diagnosed rapidly by our clinic via PCR (requires only a nasal swab.) In the face of an outbreak, the duration of signs and amount of virus shed can be reduced by vaccination in infected or suspect horses. (Also see THIS article on other summer risks for your horse.)

Are You Over-Deworming?

New parasitology research suggests that most of us are over-deworming our horses! The rotational deworming schedules that veterinarians have been recommending for years are actually based on science that is over 40 years old. 20% of the equine population actually carries 80% of all parasites! Attend our client education seminar to learn more about these new advances in equine preventative healthcare and how we can design a strategic, less expensive, and more sustainable deworming plan for your horses!