A 26-year-old woman presented with a chief complaint of nausea for 2 days. On the previous day, she had been diagnosed with tonsilitis by her previous doctor because of fever and sore throat, and had started treatment with amoxicillin. On examination, bilateral enlarged tonsils with white spots were observed. Blood tests showed elevation of hepatic transaminase and lactate dehydrogenase levels. We suspected acute hepatitis because of her recent consumption of undercooked beef and elevation of hepatitis type A antibody.