Ascaris lumbricoides

It is an intestinal roundworm, is one of the most common helminthic human infections worldwide.A. lumbricoides is the largest intestinal nematode of man.

Characteristics
Shape and Size
Males are 2 4 mm in diameter and 15 31 cm long. Females are 3 6 mm wide and 20 49 cm long. Long and slender. fertile egg 60 ¼m x 45 ¼m. Range, 45-70 ¼m x 35-45 ¼m. Round or ovoidal. With thick shell. infertile egg 90 ¼m x 40 ¼m. Range, 85-95 ¼m x 35-45 ¼m. Elongated,
Genome Information
A_lumbricoides_Ecuador_v1_5_4 total length: 316.975 Mb, GC%: 37.8 GenBank assembly accession: GCA_000951055.1 http://www.ncbi.nlm.nih.gov/genome/11969
Food Source
water contamination, vegetables contaminated with eggs.
Pathological Factor
Ascaris larvae migrating through the intestinal mucosa, liver and lungs provoke hypersensitivity reaction in the human host. In the lungs, movement of the larvae from the blood vessels into the air spaces results in haemorrhage. A. lumbricoides in the intestine induces disordered changes in the jejunal mucosa and intestinal muscle layers.
Disease
Ascariasis
Symptoms
nausea, vomiting, irregular stools, visible worms in the stool, stomach or abdominal pain, weight loss
Affected Body Organs
Intestines, liver, appendix, pancreas, lungs, gall bladder,

Classification
Kingdom Animalia
Phylum Nematoda
Class Secernentea
Order Ascaridida
Family Ascarididae
Genus Ascaris
Species A. lumbricoides