[image] ova

[image] female

Phylum Nemotoda (round worms)

Ascaris lumbricoides

"giant intestinal roundworm" females thick as a pencil and 20-35cm long males possess a hook-shaped tail infection is acquired by the fecal-oral route

[image] ova

[image] male
[image] female

Phylum Nemotoda (round worms)

Necator americanus

"hookworm" males and females 1.5 cm lenght penetrate the intact skin of a bere foot, when contact is made with infected soil. Adult hookworm leaches about .15ml of blood each day severe infection can cause anemia and lethargy.

Phylum Nemotoda (round worms)

Enterobius vermicularis

"pinworm" male 2-5mm in lenght female may reach 13mm.(1/2 inch)andmaximum width of 0.5 mm. distiguished by sharp pointed tail. females migrate down the intestinal tract to the anus where they deposit their eggs.

Phylum Nemotoda (round worms)

Trichinella spiralis

"Tishue Parasite" Uncooked pork or bear meat They encyst in the striated muscle settling in spiral arrangements.

Phylum Nemotoda (round worms)

Dracunculus medinensis

"guinea worm" People become infected by drinking contaminated water that carry water fleas infected with the larvae of the parasite. Male dies and female forms a fiery blister somewhere in the body and works her way to freedom and it can take many weeks and as long as 3 months. 36 inches long worm is attached and winded around a stick.

Phylum Nemotoda (round worms)

Toxocara

Toxocara canis and Toxocara cati Most cases are not serious and many people do not notice. children get infected for playing in dirt, or playing in dirt that contain feces from infected dogs or cats and then putting their hands in their mouths.

Phylum Nemotoda (round worms)

Dirofilaria immitis

very tiny and transmitted by an insect vector. The mosquito is the vector, this injects larvae into the host that develop into male and female microfilaria in the blood stream. These worms wind up in the heart and lungs of these animals and are rarely transmitted to humans.