Complete blood count, erythrocyte sedimentation rate, C reactive protein, antinuclear antibodies, rheumatoid factor, rapid plasma reagin, fluorescent treponemal antibody absorption test, angiotensin converting enzyme, chest X-ray, tuberculosis skin test, and Lyme, toxocara, and toxoplasmosis serologies were within normal limits. This evidence concerns the gene ACE and toxoplasmosis.