Biochemical studies on equine infectious anaemia.

This research paper investigates an outbreak of equine infectious anaemia in Naples and Aversa, Italy. A biochemical approach was used to compare the serum from infected and healthy horses, focusing particularly on enzymes, coagulation factors, lipids, and other substances, and how these change during the disease.

Introduction and Methodology

• The scientists investigated an outbreak of equine infectious anaemia (EIA), a viral disease affecting horses. The diagnosis was based on multiple parameters: clinical symptoms, pathological investigations, and serological examinations using the Coggins test, which detects antibodies against EIA.
• They collected serum samples from 45 horses infected with EIA and 11 healthy horses as controls. The serum is the component of blood that remains after clotting. It contains various substances, including hormones, electrolytes, antibodies, antigens, and many enzymes.
• Several biochemical investigations were carried out on these horse serum samples to detect changes in enzymes, coagulation factors, lipids, and other substances, aiming to understand how EIA affects these bio-components.

Results

• The results showed that EIA caused significant increases in many enzymes, including lactate dehydrogenase (LDH), leucine aminopeptidase (LAP), gamma-glutamyltransferase (GGT), creatine phosphokinase (CPK), pyruvate kinase (PK), and aldolase (ALD), as well as copper.
• Smaller changes were found in other enzymes such as succinate dehydrogenase (SDH), glutamate dehydrogenase (GLDH), malate dehydrogenase (MDH), isocitrate dehydrogenase (ICDH), acid phosphatase (AIP), lysozyme, cholinesterase, glutamic oxaloacetic transaminase (GOT), and glutamic-pyruvic transaminase (GPT).
• The same trend was observed with intrinsic coagulation factors and lipid substances, such as total cholesterol, esterified cholesterol, and triglycerides. Increases were also observed in glucose levels, another important biochemical parameter.
• A key observation was that the level of LDH-1-isoenzyme remained unchanged, suggesting it might not be affected by the disease. On the other hand, Acid Phosphatase (AcP) levels decreased slightly during the course of the disease, providing another interesting point of difference with healthy horses.

Conclusion

• The research provides valuable insights into the biochemical changes that occur in horses during an EIA infection. This information could be used to develop biomarkers for monitoring the progression of the disease or identifying possible therapeutic targets.