Ascaris lumbricoides


The largest intestinal parasite of man with a length of about 40cm. It is a nematode worm. The adult worm is is found in the intestine where it lives in its lumen and produces about 240,000 eggs per day which passes into feces where it is transmitted by feco-oral method. The larvae are hatched in the intestine after the ova are swallowed and they migrate into the blood stream where they reach the lung and alveoli. From there they are aspirated and swallowed to enter the intestine and establish parasitic life. They may cause pneumonitis in the lungs in view of their migration and /or minor gastrointestinal discomfort but in most case are asymptomatic. In children they ay block the intestine to cause intestinal obstruction or biliary tree occlusion.



There is nothing in anatomy not found in this website

Electronic School of Medicine
Creator: Oluwole Ogunranti




Cell Biology



Gross anatomy

Lymphatic drainage

Organ integration
Clinical anatomy





Chemical Pathology

Anatomical Pathology





Main Subject Course Links

Anatomy Anesthesia Biochemistry Chemical pathology Community Health
Dermatology ENT Gynecology Hematology Imaging
Medicine Medical microbiology Obstetrics Ophthalmology Pathology
Pediatrics Pharmacology Physiology Psychiatry    Surgery/Orthopedics
eLab eOSCE eProcedures eInvestigations eSchool/
eOrgans eLocator Anatomy Museum eDissector eFractures
All diseases eClerking eTreatment eDoctor ePatient