title: Detection of equine infectious anemia virus in a horse with an equivocal agar gel immunodiffusion test reaction.
abstract: A horse whose serum reacted equivocally in the agar gel immunodiffusion (AGID) test for equine infectious anemia was studied over a 3-year period. The horse remained afebrile and virus was detected in only 1 of 6 horse inoculation tests. The intensity of AGID test reactions increased temporarily following this evidence for virus. Although the AGID test reaction was equivocal and 5 of the 6 transmission attempts failed, the 1 successful transmission proved the horse was infected.
mesh_terms: D000818:Animals; D004859:Equine Infectious Anemia / Q000175:diagnosis; D006736:Horses; D005779:Immunodiffusion; D004860:Infectious Anemia Virus, Equine / Q000276:immunology*