1. Order Ascaridida (F. Ascarididae) Flashcards
(30 cards)
Species in family Ascarididae
[ APT Bpct]
Milk spots
Ascaris suis
Summer cold
Parascaris equorum
Pot-bellied appearance
Toxocara spp.
Acquired immunity increase with age
Ascaris suis
Ascaris suis is most prevalent in what age group of pigs?
Fatteners
(3-6 months)
Females produce 200,000 eggs per day
Ascaris suis
Ascaris suis eggs can remain in ___ environment for 2-4 weeks
DRY
Egg shell
• thick
• coarsely mamillated
Ascaris suis
Egg
• sperical
• brown
• thick
• pitted shell
Parascaris equorum
Egg
• thick
• smooth shell
Toxascaris leonina
The egg undergoes embryonation for 2-3 weeks, and needs high moisture & oxygen levels.
Ascaris suis
ADULT or LARVAE of A. suis?
- pneumonia
- hemorrhage
- bronchitis
LARVAE
ADULT or LARVAE of A. suis?
- mechanical blockage
- little mucosal damage
- icterus (obstruction of bile duct)
ADULT
Undergoes larval migration in LIVER causing: acute/chronic multiple interstitial hepatitis
Ascaris suis
Its larvated egg is highly resistant to drying & freezing temperature (last up to 15 years)
Ascaris suis
Affects mainly YOUNG horses
Parascaris equorum
Parascaris equorum causes this due to large number of larva breaking into lungs:
1. cough
2. fever
3. anorexia
Summer cold
Distinctly marked in adults of Parascaris equorum
LIPS
This plays a role in the transmission of Parascaris equorum, by eating feces.
Coprophagia
What does intestinal worms of Parascaris equorum cause? (3)
- Catarrhal enteritis
- Obstructive impaction
- Perforation
Which has NO terminal appendage? Which have terminal appendage?
NONE — T. leonina
HAVE — T. canis
Does larvae of Toxascaris leonina migrate in dogs & cats?
NO, does not migrate.
Toxascaris leonina is infective within __ week.
1 week
