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Eosinophilic meningitis in two cows

K Uchida1, S Tateyama, R Yamaguchi

  • 1Department of Veterinary Pathology, Faculty of Agriculture, Miyazaki University, Japan.

The Journal of Veterinary Medical Science
|December 1, 1993
PubMed
Summary

Neurological disease in cows was diagnosed as eosinophilic meningitis, characterized by eosinophil and macrophage infiltration in the brain and sometimes lungs. No infectious agents were identified, suggesting a non-parasitic, non-microbial cause.

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Area of Science:

  • Veterinary Neurology
  • Pathology
  • Immunology

Background:

  • Neurological disorders in cattle can have diverse etiologies.
  • Understanding the pathological basis of neurological signs is crucial for diagnosis and management.

Observation:

  • Five cows presented with neurological signs.
  • Histopathology revealed eosinophil and macrophage infiltration in meninges and cerebral cortical arterioles.
  • Swollen endothelial cells were noted in reactive blood vessels.

Findings:

  • Brain lesions were diagnosed as eosinophilic meningitis.
  • One case also showed eosinophil and macrophage infiltration in pulmonary arterioles within granulomatous tissue.
  • No evidence of bacterial, fungal, protozoal, or parasitic worm infections was found.

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Implications:

  • The findings suggest a potential inflammatory or hypersensitivity-mediated cause for eosinophilic meningitis in cattle.
  • Further investigation is needed to determine the specific trigger for this eosinophilic response.
  • This diagnosis aids in differentiating from other infectious or parasitic neurological diseases in bovines.