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Morphometric evaluation of "dysbacteriosis" in broilers.

E Teirlynck¹, M D E Gussem, J Dewulf

¹Institute for Agricultural and Fisheries Research, Animal Sciences Unit, Scheldeweg 68, Melle, Belgium.

Avian Pathology : Journal of the W.V.P.A

|April 19, 2011

Summary

Emerging gut disorders in broilers, termed dysbacteriosis, are linked to inflammation. Histopathology reveals villus atrophy and increased T-lymphocytes in affected birds, indicating a significant gut health issue.

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Area of Science:

Poultry Science
Veterinary Pathology
Animal Gut Health

Background:

Withdrawal of antimicrobial growth promoters has led to increased enteric diseases in broilers.
New multifactorial diseases causing gut disorders of unknown origin are emerging in poultry.
Dysbacteriosis is a prevalent field term for intestinal health problems in broilers.

Purpose of the Study:

To histopathologically analyze the intestinal tract of broilers affected with dysbacteriosis.
To correlate macroscopic dysbacteriosis scores with specific histopathological findings.
To understand the pathological changes associated with dysbacteriosis in broiler chickens.

Main Methods:

Commercial broilers were scored macroscopically for dysbacteriosis by veterinarians during necropsy.
Samples from the duodenum and caecum were collected from each broiler.
Histopathological analysis was performed on the collected intestinal tissue samples.

Main Results:

Increased macroscopic dysbacteriosis scores correlated with villus atrophy.
A decrease in the thickness of the tunica muscularis was observed with higher scores.
Increased T-lymphocyte infiltration and more/larger goblet cells were noted in the gut mucosa of affected broilers.

Conclusions:

Dysbacteriosis in broiler chickens is associated with significant histopathological changes in the intestinal tract.
The findings indicate an inflammatory reaction in the gut mucosa accompanying dysbacteriosis.
While the exact cause remains unidentified, dysbacteriosis presents a clear pathological condition in broilers.