Exercise 16: Order Ascaridida III - Large Intestinal Roundworm and Cecal Worm of Poultry

relatively smaller ascaridids

large intestinal roundworm and cecal worm of poultry

• members are _____ compared to the preceding species

large intestinal roundworm

common name for Ascaridia galli

small intestine

fowls

turkeys

ducks

geese

other birds

Ascaridia galli

• organ location - _____

• DH - (5)

Ascaridia galli

most common as well as the largest roundworm affecting domestic fowls

circular precloacal sucker

subequal spicules

narrow caudal alae

several pairs of papillae

Ascaridia galli characteristics

• _____

• _____

• tail that bears _____

• _____

cecal worm of poultry

common name for Heterakis gallinarum

ceca

fowls

turkeys

ducks

geese

other birds

Heterakis gallinarum

• organ location - _____

• DH - (5)

Histomonas meleagridis

blackhead

infectious enterohepatitis

turkeys

Heterakis gallinarum

• involved in the transmission of the protozoan _____, the causative agent of _____ or _____ of _____

smaller

Heterakis gallinarum is _____ than Ascaridia galli

posterior end

bulbous

valvular apparatus

prominent circular precloacal sucker

dissimilar spicules

prominent caudal alae

papillae

Heterakis gallinarum

• _____ of the esophagus is _____ and contains a _____

• male has a _____ and _____ and the tail bears _____ and _____

macerate

adult female

Petri dish

normal saline solution

if a preserved fecal sample containing Heterakis eggs is not available, _____ an _____ in a _____ with _____

different stages

maturity

well-developed shell

morphologically similar

slightly smaller

Heterakis gallinarum egg

• _____ of _____

• _____

• they are _____ to those of Ascaridia but are _____

Heterakis dispar

Heterakis isolonche

other species of Heterakis (2)

geese

pheasants

definitive hosts:

• Heterakis dispar - _____

• Heterakis isolonche - _____