The Veterinary clinics of North America. Equine practice2024; S0749-0739(24)00031-2; doi: 10.1016/j.cveq.2024.04.005

The Horse with Recurrent Fevers and Infections: Approach to Common Variable Immunodeficiency.

Abstract: Equine common variable immunodeficiency (CVID) is a rare, late-onset, nonfamilial humoral deficiency characterized by B-cell depletion and/or dysfunction resulting in inadequate antibody production and predisposition to recurrent infections. Serum immunoglobulin concentration and peripheral blood lymphocyte immunophenotyping are required to diagnose and characterize CVID in horses. Early recognition of the disease by the equine practitioner is paramount to managing the quality of life for these patients, for whom specific treatment is not yet available and long-term prognosis remains poor. An approach to the diagnosis, identification of complicating factors, and management of horses with CVID are discussed.
Publication Date: 2024-05-23 PubMed ID: 38789347DOI: 10.1016/j.cveq.2024.04.005Google Scholar: Lookup
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Summary

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The study investigates Equine Common Variable Immunodeficiency (CVID) – a rare, late-occurring disease in horses characterized by reduced antibody production due to B-cell malfunction or depletion, leading to recurrent infections.

Understanding Equine Common Variable Immunodeficiency

Equine Common Variable Immunodeficiency (CVID) is a rare and late-onset disease that occurs in horses. This disorder is marked by:

  • B-cell depletion or dysfunction: B-cells are a type of white blood cell that produces antibodies, the proteins that fight off infections.
  • Inadequate antibody production: Because B-cells are impaired, the production of antibodies is subsequently deficient, making the horse susceptible to recurring infections.

Diagnosis of Equine Common Variable Immunodeficiency

Identifying CVID in horses involves the following methods:

  • Serum immunoglobulin concentration: Evaluating the concentration of immunoglobulins, otherwise known as antibodies, in the horse’s blood serum. Low concentrations can hint at an issue with the horse’s immune response.
  • Peripheral blood lymphocyte immunophenotyping: This diagnostic procedure identifies the types and quantities of lymphocytes, another form of white blood cells, in the horse’s blood. Changes in these levels may also indicate an immune system disorder.

Importance of Early Recognition

Neglecting to diagnose and treat CVID early on can negatively impact the quality of life for the affected horse. Unfortunately, there’s no specific treatment currently available, and the prognosis for a long-term solution is unfavorable. Thus, recognizing the symptoms and managing them as soon as they occur is crucial for preserving the horse’s well-being.

Approach to Complicating Factors and Management

The research stresses upon the adoption of a thorough approach to identify possible complicating factors and manage the overall health of horses with CVID. This includes continuous observation, prompt response to symptoms and indications of infections, and possibly administering general treatments that may help in dealing with individual symptoms. The focus is on managing and enhancing the quality of life for the affected horse.

Cite This Article

APA
Mullen KR, Felippe MJB. (2024). The Horse with Recurrent Fevers and Infections: Approach to Common Variable Immunodeficiency. Vet Clin North Am Equine Pract, S0749-0739(24)00031-2. https://doi.org/10.1016/j.cveq.2024.04.005

Publication

ISSN: 1558-4224
NlmUniqueID: 8511904
Country: United States
Language: English
PII: S0749-0739(24)00031-2

Researcher Affiliations

Mullen, Kathleen Rory
  • Department of Biomedical Informatics, University of Colorado Anschutz Medical Campus, Anschutz Health Sciences Building, 1890 North Revere Court, Mailstop F600, Aurora, CO 80045, USA.
Felippe, Maria Julia Bevilaqua
  • Department of Clinical Sciences, Cornell University College of Veterinary Medicine, 930 Campus Road, Box 34, Ithaca, NY 14853, USA. Electronic address: mbf6@cornell.edu.

Conflict of Interest Statement

Disclosure Dr M.J.B. Felippe is the head of the Equine Immunology Laboratory, a not-for-profit research laboratory that provides immunologic testing for horses with suspected immunodeficiencies.

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