title: Unusual selective immunoglobulin deficiency in an Arabian foal.
abstract: A 10-month-old Arabian foal was evaluated for a suspected immunoglobulin (Ig) M deficiency. Decreased to nondetectable concentrations of IgM, IgA, and IgG (T), and a normal concentration of IgG, were present. Results of in vitro testing of the blood lymphocyte blastogenesis showed a weak response to the B-cell mitogen, lipopolysaccharide (LPS), but normal responses to T-cell mitogens. Results of postmortem examination showed synovitis of the left tibiotarsal and both scapulohumeral joints. Atrophy and edema of the lymph nodes and lymphocyte depletion in the thymus and spleen were seen. A subacute inflammatory infiltrate was observed in the kidney, synovium, liver, and brain. Etiologic agents were not identified. This case represents a previously unreported form of immunodeficiency disease in the horse.
authors.affiliation: Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Kennett Square.
authors.forename: M G
authors.initials: MG
authors.lastname: Boy
authors.forename: C
authors.initials: C
authors.lastname: Zhang
authors.forename: D F
authors.initials: DF
authors.lastname: Antczak
authors.forename: A N
authors.initials: AN
authors.lastname: Hamir
authors.forename: R H
authors.initials: RH
authors.lastname: Whitlock
mesh_terms: D000818:Animals; D004406:Dysgammaglobulinemia / Q000276:immunology / Q000473:pathology / Q000662:veterinary*; D005260:Female; D006734:Horse Diseases / Q000276:immunology* / Q000473:pathology; D006736:Horses; D017098:IgA Deficiency; D007074:Immunoglobulin G / Q000097:blood; D007075:Immunoglobulin M / Q000172:deficiency*; D008198:Lymph Nodes / Q000473:pathology; D008213:Lymphocyte Activation; D013154:Spleen / Q000473:pathology; D013585:Synovitis / Q000473:pathology / Q000662:veterinary; D013950:Thymus Gland / Q000473:pathology
chemical_list: D007074:Immunoglobulin G; D007075:Immunoglobulin M