On her third visit, blood tests were performed, which revealed marked eosinophilia (14%), without anemia or low platelets, elevated liver enzymes (alanine transaminase (ALT) 132 U/L, aspartate transaminase (AST) 55U/L), and negative immunoglobulin M (IgM) Epstein-Barr virus (EBV) viral capsid antigen (VCA). The gene discussed is GPT; the disease is anemia.