1. Order Ascaridida (F. Ascarididae) Flashcards
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