A 34 year-old woman comes to the emergency room because she has been having shortness of breath, palpitations, and sweating for the last 3 weeks. Four weeks ago she had a mild fever for a whole week. Her travel history is significant for yearly trips to Colombia. Her most recent trip to Colombia was 4 months ago with her church group on a medical mission trip. She slept many nights in primitive living quarters in areas without protection from reduviid insects. In Colombia, she was treated for ‘some eye infection with swelling around the eyes’. Physical examination is significant for tachycardia and pericardial friction rub. You also notice bilateral pitting edema and enlarged abdomen. ECG reveals diffuse ST segment elevation with low QRS voltages. Echocardiogram shows dilated ventricles with systolic and diastolic dysfunction, and wall motion abnormalities. Laboratory tests in this patient would most likely show serologic evidence of antibodies to which of the following?
