Clinical experience with specific immunotherapy to horse dander.

The research investigated the safety and effectiveness of a specific immunotherapy using horse dander extract in treating patients with horse-induced allergies. It revealed mild adverse reactions during the treatment’s initial phase but showed significant decrease in symptoms and high patient satisfaction at the end of the study.

Objective and Methodology

• This research aimed to explore the adverse reactions that may occur from administering specific immunotherapy (SIT) with horse dander and to identify symptoms that indicate its efficacy in treating skin and respiratory issues triggered by exposure to horses.
• Twenty-four patients with horse-induced allergies from an Outpatient Clinic in Huelva, Spain were selected to receive a standardized extract of horse dander, referred to as Alutard SQ, for their treatment.

Findings of the Study

• During the induction phase, where patients were given doses with the highest allergen concentration, five adverse reactions were observed in four patients.
• The systemic side effects included one immediate case of wheezing that responded promptly to treatment and one case of mild eye redness or conjunctival hyperemia.
• The doses were reduced for all patients which resulted in overall good tolerance to SIT.
• Patients’ sensitivity to horse dander, evaluated by deliberate exposure to horse dander, greatly reduced once patients reached the maintenance dose.
• Improvement reflected through the significant reduction of conjunctivitis among all patients, rhinitis in 93% of patients, asthma in 90% of patients, and skin symptoms in 87% of patients.

Patient Reaction and Outcome

• Patient assessment of their allergic conditions using a visual analog scale (VAS) showed significant improvement post-treatment.
• 95% of the patients were highly satisfied with the treatment in terms of its effectiveness, suitability, and minimal complications.

Conclusion and Implications

• The research concluded that specific immunotherapy with standardized horse dander extract is a safe treatment option based on the doses administered in this study.
• The treatment showed positive effects for patients with moderate-severe rhinoconjunctivitis and/or asthma, suggesting potential benefits of the therapy for such conditions.