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Visceral Larva Migrans: Immunoglobulins, Precipitating Antibodies and Detection of IgG and IgM Antibodies against Ascaris Antigen
Roy Patterson
Roy Patterson
Department of Medicine, Northwestern university Medical School, Department of Pediatrics, Bowman Gray School of Medicine, Chicago, Illinois 60611
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Carolyn C. Huntley
Carolyn C. Huntley
Department of Medicine, Northwestern university Medical School, Department of Pediatrics, Bowman Gray School of Medicine, Chicago, Illinois 60611
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Mary Roberts
Mary Roberts
Department of Medicine, Northwestern university Medical School, Department of Pediatrics, Bowman Gray School of Medicine, Chicago, Illinois 60611
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John S. Irons
John S. Irons
Department of Medicine, Northwestern university Medical School, Department of Pediatrics, Bowman Gray School of Medicine, Chicago, Illinois 60611
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Serum samples from ten children with visceral larva migrans were evaluated by analysis of: immunoglobulin concentrations, precipitin reactions against Toxocara and Ascaris antigens and blood group substances, and IgM and IgG activity against Ascaris antigen by radioimmunoassay (RIA). The elevated concentrations of serum IgE and IgG and the positive precipitin reactions which occurred in some cases are an aid in diagnosis but were not consistently present. Serum IgM concentrations were elevated in all cases. IgM or IgG antibodies against Ascaris suum antigen were detected in all cases by a solid phase RIA technique. Radioimmunoassay techniques of this type may provide a superior method of diagnosis, particularly if used with serial serum samples which demonstrate changing levels of antibodies.
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