She added that the condition is caused by a variety of factors including the consumption of certain feeds that swell after ingestion, dental problems that diminish the horse’s ability to chew feed properly, inadequate water supply, excessively rapid eating, and pathophysiological disturbances (changes in the horse’s normal mechanical, physical, and biochemical functions).
Ascarid impactions can occur after deworming when the dead and dying worms create an obstruction.
Worms in reflux
Ultrasound- worms may be visible
Signs of intestinal blockage
Surgery with enterotomy
Deworming with an effective agent in an infected foal (large die off)
Deworm with less effective product first (strongid, 1/2 dose fenbendazole
Treat with mineral oil at time of deworming
Ileal impactions and ileal hypertrophy
Ileal impactions occur most often with Bermuda grass hay and parasite issues.
Arabs, mares for ileal impactions
>5 yo for ileal hypertrophy
Rectal: SI distension, early on – doughy tubular mass