Surgical Repair of an Occipital Meningocele in a Foal.

This research article discusses the occurrence and surgical repair of a rare cranial defect called meningocele in a newborn horse. However, the horse developed infectious complications post-surgery, which ultimately led to its euthanasia.

Background

• The subject of this study was a 1-day-old male Quarter Horse diagnosed with a meningocele, a rare cranial defect marked by a mass in the occipital region. This was unique as there were no previous reports of such a condition in horses.
• The primary objective of the study was therapeutic intervention through surgical closure of the defect.

Procedure and Initial Response

• The foal underwent surgery which initially showed positive results. However, it began showing signs of infection shortly thereafter.
• The research team decided to alter the antibiotic therapy to deal with this complication, resulting in an improvement in the patient’s condition.

Deterioration and Further Steps

• On the 13th postoperative day, the patient began displaying troubling symptoms including difficulty standing, ataxia (a loss of full control of bodily movements) and limb hypertonia (an unusual tightness of the limbs).
• The researchers suspected hydrocephalus (a buildup of cerebrospinal fluid in the brain) and performed a cerebrospinal puncture.
• However, as there was no improvement post-puncture and the fluid obtained displayed high turbidity, bacterial encephalitis (a severe bacterial infection causing inflammation of the brain) was suspected.
• As a result, antibiotic therapy was restarted.

Euthanasia and Post-Mortem Findings

• When no response to the therapy was observed, the patient had to be euthanized on the 14th postoperative day.
• Post-death imaging examinations revealed dilation of the encephalic ventricles with the presence of gas, likely indicating excessive pressure inside the brain.
• A necropsy was performed, which not only confirmed the presence of bacterial encephalitis but isolated multidrug-resistant Escherichia coli as the causative agent of the infection.

Conclusion

• Through this case, the study proposes that while surgical repair of a meningocele in horses is feasible, the potential of infectious complications can limit therapeutic success.
• It illustrates the need for careful monitoring post-operation and indicates potential areas of risk when it comes to the treatment of similar cases in future.