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Studies on an ascitic syndrome in young broilers. 2. Ultrastructure.

M H Maxwell¹, G W Robertson, S Spence

¹Agricultural and Food Research Council's, Poultry Research Centre, Roslin, Midlothian, Scotland.

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

|January 1, 1986

Summary

Electron microscopy revealed virus-like particles and organ damage in broiler chicks with ascitic syndrome. Findings suggest a potential multi-factorial origin, possibly linked to hypoxia and viral agents.

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Area of Science:

Veterinary Pathology
Electron Microscopy
Avian Diseases

Background:

Ascitic syndrome in young broiler chicks is a significant concern in poultry production.
Previous histopathological studies indicated organ damage, but the underlying cause remained unclear.

Purpose of the Study:

To investigate the ultrastructural changes in organs of broiler chicks affected by ascitic syndrome.
To identify potential causative agents or contributing factors at the cellular level.

Main Methods:

Examination of hearts, livers, and kidneys using electron microscopy.
Confirmation of findings against a prior histopathological study on the same birds.

Main Results:

Observed cardiac myofibril damage, lung air space dilation, kidney lipid accumulation, and glomerular basement membrane thickening.
Identified degenerative liver cells, glycogen paucity, and heterophil infiltration in affected organs.
Detected enveloped virus-like particles (approx. 100 nm) in all organs of affected chicks, absent in controls.

Conclusions:

The ultrastructural findings in broiler chicks with ascitic syndrome share similarities with those in hypoxic birds.
The presence of virus-like particles suggests a viral component.
The syndrome is likely multi-factorial, involving both environmental factors (e.g., hypoxia) and potential viral agents.