Occlusion of brain capillaries by endothelial swelling in mycoplasma infections

Area of Science:

• Veterinary Pathology
• Neuroscience
• Microbiology

Background:

• Encephalopathy in turkeys is associated with Mycoplasma gallisepticum (S-6 strain) infection.
• Cerebral capillary occlusion has been observed in affected turkeys.
• Similar pathological findings are noted in rats with rolling disease.

Purpose of the Study:

• To investigate the role of endothelial cell swelling in cerebral capillary occlusion.
• To explore the potential link between capillary lesions and ischemic brain necrosis.
• To compare pathological findings in avian and rodent models of Mycoplasma-induced neurological disease.

Main Methods:

• Histopathological examination of brain tissue from turkeys infected with Mycoplasma gallisepticum (S-6 strain).
• Microscopic analysis of cerebral capillaries to identify endothelial cell changes.
• Comparative analysis with reported cases of rolling disease in rats.

Main Results:

• Acute swelling of endothelial cells leading to occlusion of cerebral capillaries was observed in turkeys with Mycoplasma gallisepticum infection.
• Similar capillary lesions were identified in rats affected by Mycoplasma neurolyticum toxin-induced rolling disease.
• These vascular changes suggest a mechanism for ischemic necrosis in the brain.

Conclusions:

• Mycoplasma infections can cause significant cerebral capillary pathology.
• Endothelial cell swelling and subsequent capillary occlusion are key features.
• These lesions are a likely cause of ischemic necrosis in the brain in affected animals.