Spinal cord compression in cattle after the use of an oily vaccine.

The article discusses a study which described an outbreak of compressive myelopathy in cattle related to the improper use of an oil vaccine. Neurological signs were found in 25 out of 3,000 cattle after 60 days of vaccination against foot and mouth disease and progressive paralysis of the hind limbs, difficulty in standing up and sternal recumbency during 2-5 months characterized the clinical picture. The study found circular unstained spaces between areas of severe diffuse hyaline necrosis of muscle fibers, resembling the drops of oil in the vaccine.