Salpingitis in Chickens: Symptoms, Causes and Treatment

Salpingitis is an ascending infection of the oviduct that disrupts normal egg formation. The inflammation and caseous exudate that accumulates becomes a lash egg over weeks to months.

• E. coli (most common): E. coli from the intestinal tract ascends through the cloaca into the oviduct, particularly in high-producing hens with a large, active oviduct. Stressful laying, concurrent vent contamination, and cloacal pecking injuries increase risk.
• Other bacteria: Mycoplasma gallisepticum, Salmonella, Pasteurella, and Proteus spp. can infect the oviduct, particularly following systemic infections that seed the reproductive tract hematogenously.
• High production pressure: Hens pushed to maximum production have a constantly moist, active oviduct that provides an optimal bacterial colonization environment. Heritage breeds in high-production programs and commercial layers late in their production cycle are most at risk.
• Prior reproductive disorders: Internal laying (ectopic ovulation), egg binding, and prolapsed vent all predispose the oviduct to ascending bacterial infection.

The combination of a lash egg, cessation of laying, and abdominal swelling in a laying hen is strongly suggestive of salpingitis.

• Lash egg identification: A lash egg is a firm, rubbery mass of caseous material resembling layered yellow-white rubber. It may be the size of a normal egg or much larger. The characteristic layered appearance reflects successive deposits of inflammatory material.
• Physical examination: Palpation of the abdomen reveals a fluid-filled or doughy mass. X-ray or ultrasound can identify the distended oviduct and distinguish salpingitis from ascites or air sacculitis.
• Bacteriology: Culture of the oviduct contents at necropsy or on surgical samples identifies the causative organism and guides antibiotic selection.
• Differentials: Egg yolk peritonitis (lash egg has been passed; fluid is more free in the coelom), egg binding (egg palpable in oviduct or cloaca), ascites (watery fluid without oviduct involvement).

Treatment depends on severity, the bird's value, and whether egg production is a goal after recovery.

Antibiotics (medical management): Trimethoprim-sulfamethoxazole (30 mg/kg orally twice daily for 7-10 days), amoxicillin, or enrofloxacin (under veterinary prescription) can resolve early salpingitis and prevent progression to peritonitis. Culture and sensitivity testing guides selection in non-responding cases.

Supportive care: NSAIDs such as meloxicam (0.5 mg/kg orally once daily) reduce oviduct inflammation and support recovery. Fluid support for dehydrated or systemically ill birds.

Hormone implant (Suprelorin): A GnRH agonist implant placed by a veterinarian suppresses ovulation for 6-12 months. This allows the oviduct to rest and heal without ongoing egg production stress. Recommended for pet hens where long-term production is not the goal.

Surgical spay (salpingohysterectomy): Surgical removal of the oviduct in a pet or valuable breeder hen is curative for salpingitis and prevents recurrence. Requires an avian veterinarian with surgical experience. Hen will not lay eggs postoperatively.

• Avoid over-lighting laying hens. Limit artificial light to 16 hours maximum. Extended day length pushes hens beyond sustainable production and increases oviduct infection risk.
• Maintain clean, dry vent feathers. Vent contamination with feces is a primary route for E. coli ascending into the oviduct. Trim long feathers around the vent on fluffy-feathered breeds.
• Treat prolapsed vents and vent wounds promptly. Any breach in vent integrity dramatically increases salpingitis risk.
• Provide adequate nest boxes (minimum one per 4 hens). Crowded nesting leads to egg retention and increased oviduct stress.
• Consider hormone implants for pet hens that experience recurrent reproductive tract problems. Eliminating the laying cycle eliminates the salpingitis risk.