Parascaris Equorum

Question 1

Life cycle

Answer 1

Direct
Eggs are passed in feces and larvated in environment. Very persistent.
After ingestion, undergo tracheal migration.
No Transplacental or transmammary transmission

Question 2

Pathogenesis

Answer 2

Migrating worms cause damage to lung and liver
Obstruction and intussusceptjon
Mature worms may be spontaneously purgesd

Question 3

Clinical signs

Answer 3

Respitory signs apparent in 3 and 4 weeks
Colic due to obstruction

Question 4

Diagnosis

Answer 4

History and signalment
Foals may not have eggs for 10 weeks

Question 5

Treatment

Answer 5

FBZ
Pyrantel
Resistance to ivermectin
NO Moxidectin

Question 6

Deworming protocol

Answer 6

Takes into account importance of Parascaris equorum
Young horses deworm based on calander for ascarids
Older horses on worm count for strongyles