Thrombocytopenia in horses: 35 cases (1989-1994).

This research article analyzes the risk factors associated with thrombocytopenia, a condition characterized by low platelet count, in horses. The study uses data from 3,952 equine patients and identifies factors such as breed, presence of infectious or inflammatory diseases, and various clinical variables as significant.

Introduction

In this research, the authors studied the medical records of 3,952 equine patients from North Carolina State University College of Veterinary Medicine. The goal was to identify any potential risk factors that could be associated with thrombocytopenia, a condition resulting from an exceptionally low number of platelets (less than 75,000/microL) in the blood.

Methodology and Findings

• The study focused on 2,346 horses for which a CBC (Complete Blood Count) was available. Out of these, 35 horses (1.49%) were identified as thrombocytopenic.
• The researchers compared this group with a reference population consisting of 189 horses with a normal platelet count (within the range of 75,000 to 300,000/microL).
• It was found that Standardbred horses were at an increased risk for thrombocytopenia. However, no significant risk was associated with factors like age and gender.
• Horses suffering from infectious or inflammatory diseases also showed a higher risk for thrombocytopenia.

Association with Clinical Variables

• Different clinical and clinicopathologic factors were also analyzed using a series of multiple logistic regression models.
• In the final model, variables that had a significant association with thrombocytopenia included an increased packed cell volume (PCV), increased band neutrophil count, higher total WBC (white blood cell) count, and a decreased plasma protein concentration.
• On the other hand, a high count of mature neutrophils in the blood was found to be associated with normal platelet counts.

Consequences of Thrombocytopenia

• The research found that horses diagnosed with thrombocytopenia were significantly more likely to die or be euthanized than horses with normal platelet counts. This suggests that thrombocytopenia can potentially be a life-threatening condition in horses.