Use of a bovine hemoglobin preparation in the treatment of cyclic ovarian hemorrhage in a miniature horse.

The research article discusses a case where a 4-year-old miniature horse mare suffering from anemia due to ovarian hemorrhage was successfully treated with a bovine hemoglobin-based blood substitute. Prior attempts using whole-blood transfusions had resulted in negative reactions and a lack of suitable donors, necessitating the use of the substitute. The successful treatment could suggest potential for using this substitute in similar cases.

Introduction and Background

• In the paper, the researchers begin by providing background information about a miniature horse mare that was suffering from anemia, a condition caused by a deficiency of red blood cells or hemoglobin, due to ovarian hemorrhage.
• It is mentioned that the miniature horse was four years old, indicating it was relatively young.

Treatment with Bovine Hemoglobin

• The horse was treated with an infusion of polymerized ultrapurified bovine hemoglobin (PUBH), a blood substitute derived from cows’ blood.
• This treatment followed two unsuccessful attempts to use whole-blood transfusions, both of which resulted in acute transfusion reactions– possibly allergic reactions or other negative side effects from the transfused blood.

Difficulty in Finding a Suitable Donor

• In the course of treatment, finding a suitable blood donor for the horse proved to be challenging. Among the nine available horses, no suitable donor could be found.

Blood Typing and Reactions

• Blood typing of the mare subsequently revealed it to be “Aa negative”, with the presence of allo-antibodies in its serum against the “Aa” blood group. This could have been the cause of the adverse reactions to the blood transfusions.
• Differently from the whole-blood transfusions, the PUBH treatment did not cause any serious adverse reactions and the mare successfully recovered.

Potential Alternative to Whole-Blood Transfusions

• Although comprehensive studies on the use, safety, and efficacy of PUBH in horses have not yet been carried out, this successful case treatment suggests that PUBH might be a potentially excellent alternative to whole-blood transfusions when it is called for in the treatment of conditions like the one presented by the miniature horse mare.