Ascaris lumbricoidesis the largest and, globally, the most widespread of all human intestinal roundworms (Nematode).

Life cycle:


Clinical Manifestations: 

Diagnostic Tests:

The differential when the worm is visible to the naked eye

Medically important nematodes.  


Mebendazole and Pyrantel pamoate are highly effective. Mebendazole is preferred if Trichuris trichiura is also present.    

Reexamination of stool specimens 3 weeks after therapy to determine whether the worms have been eliminated is helpful for assessing therapy but is not essential.

In cases of partial or complete intestinal obstruction due to a heavy worm load:

Control Measures: