title: Life-threatening haemolytic anaemia and infectious mononucleosis. A case report.
abstract: A 36-year-old man with infectious mononucleosis presented with massive intravascular haemolytic anaemia. The diagnosis was established by a positive Paul-Bunnell test, the demonstration of IgM antibodies against Epstein-Barr virus capsid, and IgG antibody to early antigen. The direct and indirect antiglobulin tests were negative; the pathogenesis of the severe haemolysis was attributed to the temporary synthesis of anti-i cold agglutinin having a high thermal amplitude. Although life-threatening, the episode was short-lived and responded to supportive therapy with blood transfusion and folate administration only. This case illustrates a rare association between severe haemolytic anaemia and infectious mononucleosis, it emphasizes the value of IgM-specific fluorescent antibody tests in diagnosis when patients have otherwise unexplained haemolysis.
mesh_terms: D000328:Adult; D000743:Anemia, Hemolytic / Q000209:etiology*; D006801:Humans; D007244:Infectious Mononucleosis / Q000150:complications*; D008297:Male