Equine specialty centers serving horse owners and veterinarians in Texas and surrounding states.
Monday, September 19, 2011
Updates at BVEH-Navasota
Sunday, September 18, 2011
EPM Testing
Equine protozoal myeloencephalitis (EPM) is a frustrating disease. It's been referred to as one of the most overdiagnosed, underdiagnosed and misdiagnosed equine diseases - an apt description. In some areas, every horse (particularly every racehorse) that has any real or perceived abnormality (such as not running fast enough) gets treated, usually without any attempt to make a true diagnosis. Most of these animals don't have EPM, but some might, along with horses displaying a range of sometimes vague neurological signs. When an effort is made to really establish a diagnosis, unfortunately it's not straightforward, which leads to more confusion about the disease and how to manage it.
The Animal Health Diagnostic Center at Cornell University have released a document on EPM testing and diagnosis. This document discusses when and why to test, along with important information about the available, recommended tests. It's a nice, comprehensive overview of the subject and worth a look for equine veterinarians as well as horse owners wondering whether their horse may have this enigmatic disease.
Friday, September 9, 2011
Biosecurity for Hospitals and Horse Farms
Comparison of the Accuracy of Radiography and Ultrasonography for Detection of Articular Lesions in Horses
Objective
To compare the accuracy of ultrasonographic and radiographic examination for evaluation of articular lesions in horses.
Study Design
Cross-sectional study.
Animals
Horses (n = 137) with articular lesions.
Methods
Radiographic and ultrasonographic examinations of the affected joint(s) were performed before diagnostic or therapeutic arthroscopic surgery. Findings were recorded and compared to lesions identified during arthroscopy.
Results
In 254 joints, 432 lesions were identified by arthroscopy. The overall accuracy was 82.9% for ultrasonography and 62.2% for radiography (P < .0001) with a sensitivity of 91.4% for ultrasonography and 66.7% for radiography (P < .0001). The difference in specificity was not statistically significant (P = .2628). The negative predictive value for ultrasonography was 31.5% and 13.2% for radiography (P = .0022), the difference for the positive predictive value was not statistically significant (P = .3898). The accuracy for ultrasonography and radiography for left versus right joints was equal and corresponded with the overall results.
Conclusions
Ultrasonographic evaluation of articular lesions was more accurate than radiographic evaluation.
Animal Chiropractic Care
Chiropractors view the spine as the fundamental aspect of overall health. Since the spine houses the nervous system, any abnormality of the spine affects the entire body. Therefore, the nervous system is the governor of the body, and a chiropractor’s goal is to maintain proper spinal alignment. In general, chiropractic is a drug-free approach to pet health care. A few terms associated with chiropractic are vertebral subluxation, homeostasis, adjustment, and innate intelligence. A subluxation is defined as a joint that does not properly move compared to other adjacent joints. Therefore, a subluxation is a misalignment or joint dysfunction. This is not only confined to the spine, but the majority of the subluxations are vertebral subluxations. Homeostasis is defined as an internal stability and equilibrium of an organism. This is achieved by adapting or eliminating an environmental stimulus. Chiropractic helps the body’s internal balance or homeostatic state since adjustments eliminate any hindrance on nerve function. An adjustment is a short lever, high velocity controlled thrust by the hand that is directed at specific articulations to correct subluxations. The purpose of an adjustment is to realign the joints so that normal movement can occur and eliminate nerve interference. This eliminates any pain or discomfort and allows for proper neurologic function to ensue. Innate intelligence is the body’s ability to heal itself. Chiropractic care removes any hindrance to this natural process and allows the body’s healing process to occur. Additionally, innate intelligence of the body encompasses the body’s natural ability to adapt to changes in its internal and external environments in order to maintain a state of health. In order for proper chiropractic care of your pet, a history and examination are required. The examination includes posture analysis, gait analysis, vertebral and extremity static palpation, vertebral and extremity motion palpation, orthopedic evaluation and neurological evaluation. The examination takes place upon your pet’s entrance into the clinic. Observing the animal’s demeanor and ambulation into and out of the office is vital in the examination. Even though you might only see the motion and static palpation, the examination starts as soon as you walk through the door!
Wednesday, September 7, 2011
The Equine Digestive Tract and How it Relates to Colic
Monday, September 5, 2011
Study: Horses Prefer Nonacidic Water
Medical Management of the Colicky Foal
Saturday, September 3, 2011
Equine Respiratory Surveillance Research Study
Upper respiratory tract infection is a common and important problem in horses. While typically relatively mild, it can result in lost training or competition days. Outbreaks can occur and cause widespread problems. Occasionally, serious disease or complications like secondary infections can develop. Equine herpesvirus (EHV) type 1 can also cause outbreaks of neurological disease or abortion, but is primarily transmitted via respiratory secretions and the respiratory tract. So, it's an area that clearly warrants attention.
A recent study in the Veterinary Record (Pusterla et al 2011) described a surveillance study conducted across the US, focusing on equine herpesvirus types 1 and 4, equine influenza and Streptococcus equi (strangles). They recruited veterinarians to submit blood and nasal swab samples from horses with clinical signs of upper respiratory tract infection or acute onset of neurological disease (EHV-1). Samples were tested using PCR, a molecular diagnostic test to detect bacterial or viral DNA/RNA.
Samples were collected from 761 horses, mules and donkeys from 95 veterinary clinics in 23 states between March 2008 and February 2010. One or more of the target pathogens was detected in 26% of animals.
- EHV-4 was most common, being identified in 10.8% of horses.
- Equine influenza virus was next at 7.9%.
- Streptococcus equi was detected in 6.4%.
- EHV-1 was found in 3.0%.
- 15 horses harboured two different pathogens while one had three different pathogens (I'd like to know about the infection control program of that farm...).
- Horses aged 1-5 years were most commonly diagnosed with the viral pathogens, while S. equi was most common in 6-10 year old horses.
Some other interesting findings:
- EHV-4 was most commonly found during fall and winter months. 32/52 horses whose vaccine status was known had been previously vaccinated against EHV-4 (specific timing of vaccination was not reported).
- Equine influenza was mainly found in winter and spring months. 9/19 affected horses whose vaccine status was known had been vaccinated against equine influenza.
- Streptococcus equi was most common in the winter and spring. 12/24 horses with known vaccine status had been previously vaccinated against strangles.
- EHV-1 was less common in the summer than other months. Most affected horses (10/12) whose vaccine status was known had been vaccinated.
- Standardbreds, mules and donkeys were over-represented in the EHV-1 infected group.
- Quarter Horses and American Paint Horses were overrepresented in the equine influenza group and, along with ponies, in the S. equi group.
This study provides some interesting information about causes of upper respiratory tract infections in horses, and risk factors for different pathogens. An important thing to consider, however, is that >70% of cases were not diagnosed. Whether that indicates weaknesses in current tests (e.g. intermittent shedding of the pathogens by sick horses, tests that don't detect all horses that are shedding), poor sample collection or preservation during transport, or the presence of other important but unknown/un-investigated causes of disease, is unclear.