Pathology in Practice. A equuli septicemia in a neonatal foal.

The research article discusses a case study of a neonatal Quarter Horse foal that contracted a fatal septicemia infection, caused by Actinobacillus equuli, after being rescued from a flood.

Introduction and Background

• The research starts by describing a unique case: a 1-day-old female Quarter Horse who was found alive in a flash-flooded area on a farm in north Georgia during the summer of 2008.
• Even though the foal displayed signs of weakness and severe hypothermia, the team initiated immediate supportive treatment, including plasma transfusion and intravenous fluid therapy. Unfortunately, the foal succumbed to her illness five hours post-rescue.

Observations and Analysis

• The study details the postmortem examination. The foal’s abdominal cavity contained moderate amounts of cloudy, yellow fluid. Notably, the kidneys were bilaterally swollen and blood-filled, containing several pale foci (approx. 1-2mm in diameter) spread across the capsular and cut surfaces.
• Further, diffuse bilateral adrenocortical hemorrhage occurred, pointing to severe internal damage. Areas of hemorrhage were also found on the outer layer of the heart and tracheal mucus membrane, suggesting that hemorrhaging was prevalent throughout the body.
• The foal’s lungs were also found noticeably swollen and filled with blood, exuding excessive fluid upon physical contact – a condition known as edema, commonly associated with internal fluid imbalance.
• The foal’s stomach only contained small amounts of partially digested milk. Aside from these primary findings, no other gross changes were apparent during the postmortem examination.
• Given these observations, fresh samples of kidney tissue were collected and sent for aerobic bacterial culture to ascertain the cause of the pathology.

Implications and Further Examination

• The research article does not elaborate on the outcome of the bacterial culture results. Nevertheless, given the foal’s symptoms and gross necropsy findings, it is suggested that the cause of death was equuli septicemia, a serious bacterial infection that typically affects equine neonates.
• The case underscores the importance of early veterinary intervention and appropriate postnatal care for neonatal foals, especially those exposed to unfavorable environmental conditions, such as natural disasters.