[Enzootic calcinosis in the horse].

The research paper discusses several observed cases of equine enzootic calcinosis (a bone disease) in Southwest Germany, suspected to be spurred by consuming a particular plant species, Trisetum flavescens. The symptoms, typically shown in summer, include mobility issues, spine curvature, tenderness in the lower leg muscles, weight loss despite decent food intake, and chest pain.

Study Summary

• The study is centered on the incidence of enzootic calcinosis in breeding mares in a highland region of Southwest Germany.
• The investigation reports various clinical signs in the affected horses. These signs become evident during late summer.

Observed Symptoms

• The symptoms include disturbances in movement signifying probable musculoskeletal issues.
• Moderate kyphosis, a spinal disorder leading to excessive outward curvature of the spine, was noticed, further suggesting skeletal problems.
• The affected horses showed sensitivity to palpation, especially in the flexor tendons and suspensory ligaments, indicating potential damage or inflammation.
• Despite good nutrition, the horses experienced weight loss, hinting at metabolic or digestive problems.
• Pain upon chest percussion was noted, which might be a symptom of underlying respiratory or cardiac issues. Less common were observations of renal and heart diseases.

Causes of Enzootic Calcinosis

• The researchers conclude that the presence of Trisetum flavescens in significant quantity in the horses’ diet might be the primary cause of the disease.
• This plant species could contain certain toxins or substances that might trigger the disease’s unusual bone growth and other symptoms when ingested by the horses.