Dangers of Potomac Horse Fever

Potomac Horse Fever is a disease caused by the bacterium Neorickettsia risticii. This bacterium infects horses when they ingest aquatic insects or snails that carry the organism. The disease is named after the Potomac River region where it was first identified, but it can occur in various areas, particularly near rivers, streams, and other bodies of water. Mortality rates have been reported between 5% and 30% according to AAEP.org. Horses living near a body of water, standing water or stream are at an elevated risk of contracting PHF. 

 Signs are variable but may include:

• Fever
• Mild to severe diarrhea
• Laminitis
• Mild colic
• Decreased abdominal sounds
• Pregnant mares may abort infected fetuses. 

Contact Skillman Veterinary Services to learn more about keeping your herd safe and vaccinating for Potomac Horse Fever.