Gapeworm in chickens is a serious respiratory parasitic infection caused by the worm Syngamus trachea, which affects the trachea (windpipe) and lungs of infected birds. This parasite feeds on blood and can cause breathing difficulties, especially in young chickens and turkeys.
This guide explains the symptoms, causes, life cycle, treatment, and prevention of gapeworm infection in poultry.
Table of Contents
What Is Gapeworm in Chickens?
Gapeworm is a parasitic roundworm that attaches itself inside the respiratory tract of birds. Once infected, chickens may struggle to breathe due to blockage of the trachea.
Young chickens are more vulnerable because their respiratory system is smaller and more easily obstructed.
Life Cycle of Gapeworm (Syngamus trachea)
The infection begins when chickens accidentally ingest gapeworm larvae from contaminated soil, feed, or intermediate hosts such as earthworms and snails.
- Larvae enter the digestive system after ingestion
- They migrate to the trachea and lungs
- Adult worms attach and feed on blood
- Eggs are produced in the windpipe
- Eggs are either coughed out or swallowed and passed in feces
The prepatent period (time from infection to egg production) is approximately 17 to 20 days.
Symptoms of Gapeworm in Chickens
Common signs of gapeworm infection include:
- Open-mouth breathing (gasping or “gaping”)
- Neck stretching while trying to breathe
- Coughing and wheezing
- Excessive panting
- Hissing or rattling sounds
- Swollen throat area
- Reduced activity and weakness
- Possible pneumonia in severe cases
If untreated, severe infections can lead to suffocation and death.
Causes and Risk Factors
Gapeworm spreads through contaminated environments where infected larvae or intermediate hosts are present.
- Dirty or unclean poultry environments
- Presence of snails, slugs, or earthworms
- Free-range chickens in infected soil
- Poor sanitation in coops and runs
- Young chickens with weaker immunity
Treatment for Gapeworm in Chickens
Gapeworm infections are typically treated using anthelmintic (deworming) medications prescribed for poultry parasites.
- Administer approved poultry dewormers
- Isolate infected birds if possible
- Clean and disinfect the coop thoroughly
- Improve ventilation and hygiene
Severe cases may require veterinary intervention.
How to Prevent Gapeworm in Chickens
Prevention is the most effective method of controlling gapeworm infections in backyard and commercial flocks.
1. Control Intermediate Hosts
- Reduce snails, slugs, and earthworms in the environment
- Keep the ground dry and well-managed
2. Maintain Clean Housing
- Regularly clean coops and bedding
- Remove droppings frequently
- Sanitize feeding and watering areas
3. Rotate and Manage Free-Range Areas
- Rotate grazing areas to reduce parasite buildup
- Avoid overcrowding in confined spaces
4. Improve Biosecurity
- Limit exposure to contaminated soil
- Keep new birds in quarantine before mixing
Conclusion
Gapeworm in chickens is a preventable but potentially serious respiratory parasite infection. Early detection, proper deworming treatment, and strict hygiene practices are essential to protect your flock.
By maintaining clean living conditions and controlling intermediate hosts, you can significantly reduce the risk of Syngamus trachea infection in your chickens.
