Difference between Male and Female Ascaris lumbricoides

 Ascaris lumbricoides is a large parasitic nematode, commonly known as the human roundworm. It is the most common intestinal nematode infection in humans worldwide, causing ascariasis. This parasite is particularly prevalent in tropical and subtropical regions with poor sanitation, where its eggs contaminate soil and are ingested through contaminated food or water.

Once ingested, the Ascaris eggs hatch in the small intestine, and the larvae embark on a complex migratory journey through the body, traveling through the bloodstream to the lungs, up the respiratory tract, and then back down to the intestine where they mature into adult worms. These adult worms reside in the small intestine, feeding on intestinal contents and laying a vast number of eggs, which are then passed in the feces, continuing the life cycle. While many infections are asymptomatic, heavy worm burdens can lead to a range of health issues, including malnutrition, growth impairment, intestinal blockage, and even severe pulmonary symptoms during larval migration.

Male Ascaris vs Female Ascaris

Male Ascaris	Female Ascaris
It is smaller than the female.	It is larger than the male.
The posterior end is curved	The posterior end is straight
Two equal chitinous spicules project through cloacal aperture	Spicules (pineal setae) are absent.
A cloaca for receiving the anus and genital opening is present. The cloaca opens outside through cloacal aperture.	There are separate anal and genital apertures. No cloaca is present.