FieldDxSeptic Arthritis of Neonatal FoalsClinical signs, differential diagnosis, treatment and prevention in horses.
Overview
A joint infection in newborn foals, usually arising as one manifestation of generalized neonatal sepsis. Most commonly E. coli, spreading hematogenously; other gram-negative and gram-positive bacteria also implicated.
Clinical signs
- Characterized by heat, pain, and swelling associated with the joints and physes.
- Sick foals are often recumbent, spend little time feeding, and rapidly lose body condition.
- Persistent recumbency can lead to decubital ulcers, corneal ulcers, and compression necrosis over bony prominences.
- Survivors face a poor prognosis for future athletic activity; Thoroughbred foals with septic arthritis have odds of only 0.28 (roughly one-quarter of the likelihood) for racing compared to healthy cohorts.
Predisposing factors
- Failure of passive transfer of colostral immunoglobulins, environmental contamination, and in utero or umbilical infections (omphalitis).
Treatment
- Early, aggressive treatment is critical.
- Administer high doses of parenteral antibiotics for at least 1 week (ideally guided by culture and susceptibility).
- Perform joint lavage with saline and antibiotic solutions.
- Provide soft bedding, frequently turn recumbent animals, and massage affected joints.
- If joint ankylosis begins to develop, support the foal in a sling for short periods as frequently as possible.
Prevention
Ensure timely and adequate colostrum intake immediately after birth; maintain strict hygiene in foaling stalls.
Source
A Textbook of the Diseases of Cattle, Horses, Sheep, Pigs and Goat by ELSEVIER (Passage 47); The Merck Veterinary Manual 11th Edition (Passage 264); (Passages 177, 316)
MSD Veterinary Manual — Sepsis in Foals (accessed 2026-08-11)
Condensed and attributed, never reproduced whole. Open the full entry in the app.