Ascariasis By Chelsea Marie, PhD, University of Virginia; William A Petri, Jr, MD, PhD, University of Virginia School of Medicine Reviewed / Revised Sep 2022 View Patient Education Pathophysiology Symptoms and Signs Diagnosis Treatment Prevention Key Points Topic Resources Ascaris lumbricoides... Ascariasis is infection with Ascaris lumbricoides or occasionally Ascaris suum (a closely related parasite of pigs).