Nematodes

Name the structure

copulatory spicules

Name the structure

Enoplea

Name the structure

Chromadorea

Name the structure

copulatory bursa

name the structure

Ventriculus

name the structure

Intestinal cecum

Name the genus and segment

Stichosome esophagus

What is the genus and species of this parasite?

Trichuris trichiura

What is the genus and stage of this parasite?

Trichuris eggs

What is the genus, species, and stage of this parasite?

• Embedded in intestinal mucosa

• Long stichosome esophagus

• Eggs in uterus

Capillaria philippinensis Adult

What is the genus, species, and stage of this parasite?

• 35 to 45 μm in length by 20-25 μm in width

• two flat polar prominences and a striated shell

• unembryonated when passed

• Smaller than C. hepatica a spurious passage when

infected liver is eaten

Capillaria philippinensis eggs

What is the genus, species, and stage of this parasite?

• Females measure 20–35 cm long with straight tails

males are smaller at 15–31 cm and tend to have curved tails

• possess three “lips” at the anterior end

Ascaris lumbricoides adult

What is the genus, species, and stage of this parasite?

• Fertile eggs range from 45 to 75 μm in length

• Rounded and have a thick shell with an external mamillated layer that is often stained brown

Ascaris egg

What is the genus, species, and stage of this parasite?

Enterobius vermicularis adult

What is the genus, species, and stage of this parasite?

Enterobius vermicularis eggs

What is the genus, species, and stage of this parasite?

Enterobius vermicularis larvae

What is the genus species and segment of this parasite?

Ancylostoma duodenale buccal capsule

What is the genus species and segment of this parasite?

Necator americanus buccal capsule

What is the genus species and segment of this parasite?

Ancylostoma duodenale copulatory bursa

What is the genus species and segment of this parasite?

Necator americanus copulatory bursa

• Thin-shelled colorless

• Measure 60-75 μm by 35-40 μm

• Typically in 4 cell staged when laid, but can mature into egg containing larva if transit slow

Hookworm egg

What is the genus, species, and stage of this parasite?

• filariform larvae (L3) are up to 600 μm long

• The tail is notched

• esophagus to intestine ratio is 1:1

Strongyloides filariform larva

What is the genus, species, and stage of this parasite?

• 180—380 μm long

• Short buccal canal

• rhabditoid esophagus (divided

into three sections) extending 1/3 of the body length

• Prominent genital primordium

Strongyloides rhabditiform larvae

What is the genus, species, and stage of this parasite? (tissue nematode)

Trichinella spiralis