Infectious Diseases

News, Articles, Videos and other content about Infectious Diseases

Strangles Signs, Risk Factors, and Complications Evaluated

If your horse had strangles, would you be able to tell? He'd probably have those token swollen lymph nodes and maybe a fever, right? It's possible, but researchers recently determined that these signs alone might not be the only ones that should prompt a strangles test. In fact, more than a quarter of the horses in their recent research presented ...

Equine Infectious Disease Outbreak Response 101

From equine herpesvirus and influenza to strangles and coronavirus, infectious diseases can cause quite a stir in the horse industry—quarantines, canceled competitions, and, in some cases, even horse deaths or the threat of human infection. And something all horse owners and veterinarians should know is how to respond in the face of an infectious di...

Placentitis Could be Detected Early with Hormone Testing

Equine placentitis is subtle in its onset, often causing the death of its victim—the unborn foal—before veterinarians can detect and treat it. Equipping veterinarians to identify these cases of placental infection early could help them prevent abortions, lost time on the breeding calendar, and the general heartbreak that can come with losing a...

No Additional Signs of EHV-1 at Fair Hill

The horse quarantined with a suspect case of equine herpesvirus-1 (EHV-1) at the Fair Hill Training Center, in Elkton, Md., will be retested next week, according to a statement from Kathleen Anderson, DVM, owner and manager of the Elkton-based Equine Veterinary Care, PC.

Study: Not All WNV Vaccines Render Same Immune Response

When it comes to getting shots, a single needle prick might seem like a better idea compared to multiple pokes. But when it comes to your horses' West Nile virus (WNV) vaccinations, multiple injections might be the way to go: Researchers recently tested horses' serologic (blood) response to six WNV vaccination regimens and found some significant d...

Can Vaccination Protect Horses from Neurologic EHV-1?

In the equine industry three simple letters, when said in order, can silent a room of horsemen, turn a showground into a ghost town, and send shockwaves through barns. They're E, H, and V, and they stand for equine herpesvirus-1, a contagious equine virus that can cause serious neurologic problems in affected horses. Fortunately for owners, veterinari...

Veterinarians Making Progress on National Equine Health Plan

Equine herpesvirus myeloencephalopathy (EHM) put dozens of show horses at risk for infection after they were exposed to a sick horse at a single competitive event in Utah in 2011. Unaware of the exposures, owners of these horses dispersed the show animals to 19 states and several Canadian provinces, unleashing the potential to infect others in epidemic pr...

Researchers Review Equine Multinodular Pulmonary Fibrosis

Since it was first identified in 2007, deadly equine multinodular pulmonary fibrosis (EMPF) has been reported in numerous horses across North America and Europe. While still considered a rare disease, EMPF appears to be related to a very common one—equine herpesvirus (EHV)—and early treatment appears to be the main hope for survival.

CEM Screening Techniques Tested

Researchers have confirmed the importance of including exposed mares when conducting surveillance for contagious equine metritis (CEM) in the recent South African outbreak, along with specific stallion sampling and screening methods in that country for the venereal disease.

Study Confirms Horses Respond to Negative Reinforcement

If we train our horses correctly, we should sense that they get “lighter” as training progresses. In other words, we should be able to execute cues with less force and get the same result. But until now, measuring that “lightness” has always just been a matter of “feeling,” so to speak: Danish researchers have put the s...

Equine Placentitis Update

What's the most common cause of late-term abortion in horses and remains challenging for veterinarians to diagnose and treat, despite ongoing research? If you said placentitis, you're right. To bring attendees of the 2013 Society for Theriogenology Conference, held Aug. 7-10 in Louisville, Ky., up to speed on the latest research on the complex top...

Top Foal-Related Studies of 2012-'13

Even though they're small in stature, foals can have some big health problems. And researchers around the world are continually working to better understand these health problems and find more effective ways to treat them. At the 2013 Society for Theriogenology Conference, held Aug. 7-10 in Louisville, Ky., Chris Sanchez, DVM, PhD, Dipl. ACVIM, associ...

Botulism in Horses: An Update

Rising hay prices and the financial crunch caused by 2009's Great Recession drove many horse owners to seek less expensive forage sources, including large round bales, haylage, and silage. But according to Amy Johnson, DVM, Dipl. ACVIM, compromising on hay quality and feeding from half-ton bales led to a larger problem: an uptick in reported cases of ...

Equine Emerging Diseases Reviewed

Tracking emerging and re-emerging equine diseases helps the horse world attempt to stay a step ahead of economically devastating and deadly outbreaks. For that reason, equine veterinarians and industry members gathered on June 14, for Merck Animal Health’s "Equine Emerging and Re-emerging Disease Luncheon" at the 2013 American College of V...

Drug Peramivir Could Help Horses Suffering from Flu

Flu season for horses can be any season. And considering that even horses vaccinated against the equine influenza virus (EIV) can still “catch the flu,” this disease is cause for concern. A group of Japanese researchers, however, recently evaluated a flu inhibitor in horses and found that it could help EIV-infected animals recover more quickly.

AAEP, AHC Partner to Prevent Equine Disease Outbreaks

When a horse contracts a disease, the owner or caretaker usually focuses solely on getting the horse healthy again and protecting others on the farm from illness. But in reality, certain ailments could have community-, region-, and even industry-wide effects. For instance, an equine viral arteritis or contagious equine metritis outbreak could shutter the ...

AHC, AAEP Issue Letter on Equine Disease Outbreaks

The American Horse Council and the American Association of Equine Practitioners issued an open letter to the horse industry March 28 regarding equine disease outbreaks in the United States. In their communication, the organizations outline current horse health issues facing the industry and seek equine community participation in developing a National Equi...

Triaging Acute Equine Neurologic Emergencies

A horse owner's day can go from great to horrific in a matter of seconds if he or she arrives at the barn to find their charge either staggering around the field or completely unable to rise. A prompt call to the veterinarian is warranted in these scenarios, but what should an owner expect when the veterinarian arrives?

New Test Could Detect Equine Lyme Disease Sooner (AAEP 2012)

Diagnosing Lyme disease in horses is tricky business; not all horses that contract the causative bacterium, Borrellia burgdorferi, from infected ticks develop the debilitating condition, and those that do might not show signs until several months after infection. As with many diseases, early detection can mean swifter resolution, along with better recover...

California Authorities Seek Six Horses for EIA Testing

Agricultural authorities in California are seeking six animals to receive follow-up testing in connection with a California Department of Food and Agriculture (CDFA) Animal Health Branch study of equine infectious anemia (EIA) infections in racing Quarter Horses.

EPM-Causing Organisms Widespread in U.S. Horses (AAEP 2012)

The neurologic disease equine protozoal myeloencephtalitis (EPM) is caused by two protozoal agents, Sarcocystis neurona and, less commonly, Neospora hughesi. While researchers have long understood S. neurona's life cycle and transmission, their understanding of N. hughesi is less concrete. To compare the two organisms, a research team from California ...

Optimizing Piroplasmosis Treatment Protocols (AAEP 2012)

The tick-borne protozoal disease equine piroplasmosis (EP) impacts horses worldwide, causing hemolytic anemia (the body's immune system attacks and kills its own red blood cells) and even death. Veterinarians' drug of choice for eliminating the causative parasites, Theileria equi and Babesia caballi, is imidocarb dipropionate, which is effective b...

Factors Associated with Surviving Potomac Horse Fever (AAEP 2012)

Potomac horse fever (PHF), a somewhat regional rickettsial disease, causes acute diarrhea and leads to death in up to 30% of affected horses. In an effort to understand the disease better, Sandra Taylor, DVM, PhD, Dipl. ACVIM, of Purdue University's school of veterinary medicine, performed a retrospective study in which she and colleagues looked for s...

Minnesota EHV-1: Two Horses in Stable Condition

Two horses are in stable condition while being treated for neurologic equine herpesvirus-1 (EHV-1) at the University of Minnesota (UM) Large Animal Hospital, according to the treating clinician. Both animals--who reside at the same Wright County, Minn., farm--have tested positive for the virus since being admitted to the clinic this week. A third horse (t...

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