title: False-positive IgM anti-toxoplasma fluorescent test due to rheumatoid factor.
mesh_terms: D000328:Adult; D005189:False Positive Reactions; D006801:Humans; D007074:Immunoglobulin G; D007075:Immunoglobulin M / Q000032:analysis*; D007223:Infant; D012217:Rheumatoid Factor / Q000032:analysis*; D014122:Toxoplasma / Q000276:immunology*
chemical_list: D007074:Immunoglobulin G; D007075:Immunoglobulin M; D012217:Rheumatoid Factor