Potomac Horse Fever


Potomac Horse Fever Cases Reported in New York; Vets Encourage Vaccination

August 25, 2010

Officials have confirmed the number of Potomac Horse fever (PHF) cases in northern New York has been higher than usual in recent weeks, encouraging owners to vaccinate but noting that a rise in cases is relatively common this time of year.... Read More


Kentucky Horse Diagnosed with Potomac Horse Fever

August 04, 2010

Kentucky Department of Agriculture officials have concluded a horse that was recenty diagnosed as having Potomac horse fever that was diagnosed in a horse at Keeneland's training center on Rice Road was not contracted or introduced to the horse whil... Read More


Boarding Barn Health

June 01, 2010

Moving your horse into a boarding barn is a lot like sending your child to school for the first time. Just as you would in choosing a school for your kids, you want to do your research, asking all pertinent questions.... Read More


Vaccination Basics For Horses

June 01, 2010

Vaccines are "cheap insurance" to protect your horses from more costly--and potentially deadly--diseases.... Read More


Summer is Prime Time for Potomac Horse Fever

April 24, 2009

With summer just around the corner, now is the time to vaccinate horses against Potomac horse fever (PHF).

"Horse owners need to be aware of the disease and its seasonality," said Julia Wilson, DVM, Dipl. ACVIM, associate... Read More


Vaccination Yearly Planner

January 01, 2009

Immunizations are the cornerstone of disease prevention if given appropriately and in a timely manner.... Read More


Missouri Vets Report Surge in Potomac Horse Fever Cases

August 19, 2008

Potomac horse fever, a potentially fatal disease, has been reported among horses in the St. Louis, Mo., area in unusually high numbers. Philip Johnson, BVSc, MRCVS, MS, Dipl. ACVIM, a veterinarian at the University of Missouri College of... Read More


Equestrian Center Reports 3 Cases of Potomac Horse Fever

August 10, 2008

Three cases of Potomac horse fever were reported in July at the Star Equestrian Center on Greencastle Pike near Hagerstown, Md.

Ginny Gaylor, director of the Star Equestrian... Read More


Potomac Horse Fever: Don't Ignore Fevers!

July 07, 2008

Summer and fall are key seasons for the appearance of Potomac horse fever, which is caused by the bacterium Neorickettsia risticii. Don't be fooled by the name; Potomac horse fever originally was identified in 1979 as a sporadic disease... Read More


Vaccination Schedule Guidelines

April 21, 2008

Developing a vaccination schedule is not as straightforward as it sounds. So much of what you should vaccinate for depends upon such factors as where you live, how often your horse travels, how old he is, his vaccination history, and what infectious ... Read More


Vaccination, Early Recognition Key with Potomac Horse Fever

April 17, 2008

The name is deceiving, but Potomac horse fever (PHF) is not just a concern for horses near the Potomac River. Cases have been found across most of the United States.1 Knowing the key signs of PHF and watching carefully for them can... Read More


PHF Vaccine Efficacy: Better Safe than Sorry?

August 01, 2007

Has there been new research completed on the available vaccines for Potomac horse fever?... Read More


Potomac Horse Fever Cases Popping Up in Ohio

July 15, 2007

Cases of Potomac horse fever (PHF) are starting to appear in Ohio, according to Catherine Kohn, VMD, PhD.... Read More


Potomac Horse Fever: Cause and Treatment

July 01, 2007

Potomac horse fever (PHF) is a disease that affects horses during warm weather months, occasionally causing outbreaks of diarrheal illness in horses that are kept near rivers, streams, or in irrigated pastures.

The bacterium responsible for th... Read More


Avoid Mayflies to Minimize PHF Risk

June 30, 2007

Minimizing your horse’s risk of contracting Potomac horse fever (PHF) might be as simple as shutting off the lights.

Mayflies—swarms of which are common in Southeast Minnesota and adjacent areas of Wisconsin—were incriminated as a vector... Read More


Potomac Horse Fever: A Review

June 21, 2007

By Nathan M. Slovis DVM, Dipl. ACVIM, CHT, director, McGee Medical Center, and reprinted with permission from the Kentucky Equine Education Project newsletter

Potomac horse fever (PHF) is a bacterial disease that can affect... Read More


Medicine and Disease

March 23, 2007

Equine authorities at the 2006 AAEP Convention discussed numerous medical topics, get the summary here.... Read More


AAEP Convention 2006: Medicine

March 01, 2007

Uplifting Applications for UC Davis Large Animal Lift

John... Read More


Vigilance Key in Managing for PHF

November 26, 2006

Tennessee Cases Increase

Potomac horse fever (PHF) probably has been endemic in the Western Hemisphere as long as horses have inhabited the region—perhaps even since the prehistoric era--and it's here to stay. As awareness of th... Read More


13 Kentucky Potomac Horse Fever Cases

October 01, 2006

A few cases of Potomac horse fever (PHF) occur each fall in Kentucky. This year they were detected earlier than normal. Nathan Slovis, DVM, MS, Dipl. ACVIM, of Hagyard Equine Medical Institute in Lexington, Ky., said the early occurrence probably... Read More


13 Kentucky Potomac Horse Fever Cases Confirmed

August 12, 2006

A few cases of Potomac horse fever (PHF) occur each fall in Kentucky. This year, a few cases have been seen, but they occurred a little earlier than normal. Nathan Slovis, DVM, MS, Dipl. ACVIM, of Hagyard Equine Medical Institute, said the early... Read More


Vets Watch for Hurricane-Related Illnesses

October 12, 2005

With water pooling in places that it normally doesn't and sharp debris all around, horse owners can't help but wonder if conditions left by Hurricanes Katrina and Rita will cause an increase in the reports of illnesses such as tetanus,... Read More


Potomac Horse Fever Outbreak in New York

August 25, 2004

Potomac Horse fever (PHF) season is now underway in New York. "There are no actual numbers for the (amount of) disease because it is spread out," according to Jenny Gold, DVM, an equine veterinarian in the large animal clinic at Cornell... Read More


Potomac Horse Fever in Oklahoma

October 01, 2003

The death of at least one Oklahoma horse has been definitively linked to Potomac horse fever (PHF), a disease rarely found in the state. Two of her stablemates likely died of the same illness. The horse manager at the farm with the confirmed cas... Read More


Detecting PHF in Oklahoma; Behind the Headlines

September 02, 2003

The recent confirmation of Potomac horse fever (PHF) in an Oklahoma horse was possible because of relatively new--and inexpensive--testing techniques that help speed diagnose of the disease. This allows horse owners to be alerted... Read More