- Cause : congenital and acquired forms of failure of the urachus to occlude at the umbilicus.
- Acquired types may be associated with systemic debilitation and/or umbilical infection.
- Signs : Presents within first 2 weeks of life with moist umbilicus and leakage of urine from the patent urachus.
- In acquired forms may be severe systemic signs in compromised neonatal foal.
- Diagnosis : history, signs.
- Treatment : is usually medical with antibiotic therapy, local umbilical cleaning/skin protection, possibly cautery, primary problem care and surgical resection of the umbilical remnants with persistent cases.
- Prognosis : guarded in systemically ill foals.
- Umbilical herniation [Umbilicus: hernia] .
- Ruptured bladder syndrome .
- Septic omphalitis .
- Uroperitoneum due to rupture of the urachus or bladder within the abdomen and leakage of fluid into the subcutaneous tissue through the inguinal canal.
- Extraperitoneal rupture of the penile urethra .
- Moist umbilicus with drips, leaks or streams may or may not be associated with micturition.
- Septic omphalitis with swelling and pain in some cases.
- Secondary symptoms are seen in compromised debilitated neonatal foals.
- Subcutaneous and/or abdominal muscle leakage of urine from urachus leads to swelling and cellulitis of the ventral abdominal wall.
- Umbilical ring is normal.
- Good if primary urachal fistula.
- Guarded for septic omphalitis or debilitated foal.
Reasons for treatment failure
- Failure to spontaneously close.
- Poor for foals with septicemia or systemic diseases.