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Broiler chicken with a duplicated lower intestinal tract

H D Chapman¹, J N Beasley, A B Hacker

¹Department of Poultry Science, University of Arkansas, Fayetteville 72701, USA.

|February 10, 1998

Summary

A broiler chicken presented with a rare duplication of its lower intestinal tract, featuring a branched ileum and enlarged ceca. This congenital anomaly resulted in a non-functional, swollen rectum disconnected from the exterior.

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Area of Science:

Veterinary Pathology
Avian Anatomy
Congenital Malformations

Background:

Understanding congenital anomalies in poultry is crucial for flock health and economic viability.
Broiler chickens are selectively bred for rapid growth, which can sometimes be associated with developmental abnormalities.

Observation:

A case of a broiler chicken with a duplicated lower intestinal tract was identified.
The malformation involved the ileum branching into two distinct tracts.
The affected branch exhibited ileal swelling, paired grossly enlarged ceca, and a swollen, blind-ending rectum.

Findings:

The duplicated ileum led to abnormal intestinal architecture.
Enlarged ceca suggest potential functional or developmental compensation or pathology.

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The rectum was a non-patent, blind sac, indicating a severe disruption of the digestive tract's terminal portion.

Implications:

This case highlights the importance of recognizing rare congenital defects in broiler chickens.
Such anomalies can impact animal welfare and require further investigation into underlying genetic or environmental factors.
Detailed pathological descriptions aid in veterinary diagnostics and comparative anatomy studies.