Parasites and Deworming in Horses Flashcards
Ascarids aka ____ _____ affects immature animals (3 months to two years) and can cause what main issue?
Parascaris equorum; can cause severe intestinal block
____ are highly responsive to Panacur aka Fenbendazole
Ascarids aka parascaris equorum
Small strongyles are usually found where in adult horses?
In large intestine and do not migrate outside of the intestinal wall
Small strongyles infective stage is ___ which migrates to the ___ and ___ where they encyst. Usually large number present in fall/winter
L3 stage; cecum and colon
_____ aka larval cyathostominosis causes what clinical syndrome?
Hypobiosis; clinical syndrome caused by emergence of encysted cythostomin larvae from the LI walls
causes acute profuse watery diarrhea, ventral edema
What is the tx for Hypobiosis aka larval cyathostominosis?
Fluids, NSAIDs, Larvicidal meds (Ivermectin)
Fecal floats and FEC are NOTT diagnostic
Large strongyles aka ____ ______
strongylus vulgaris
Strongylus vulgaris migrates to what anatomic location?
Caudal mesenteric a. causing ischemic necrosis of the bowel
Is strongylus vulgaris sens. to ivermectin?
YES
Pinworms aka ___ ____ lives in caudal GI tract of horses and tx is ivermectin
Oxyuris equi
Bot flies attach to the ________ and _______ mucosa of the _____
non glandular and non glandular mucosa portions of the stomach
Need less than ___ eggs per gram on FEC
100
T/F avoid exposing generation after generation to the same anthelmintic
True
Use something new every 3rd time
What is Dr. Mochal’s deworming protocol for mature horses in the fall?
Deworm everyone w/ Ivermectin/Praziquantel combo at 1st cold weather
Tx LG strongyles, small luminal strongyles, tapes, bots, & pinworms
What is Dr. Mochal’s deworming protocol for mature horses in the spring?
- Perform EPG on everyone
* Deworm everything greater than 100 EPG w/ pyrantel, if weight loss & loose manure, use Panacur Power Pack (FBZ)
Horses usually become immune to what worm as they age?
ascarids
Encysted small strongyles in the intestinal wall causes….
How can we tx it???
larval cyathostominosis from small strongyles
Double dose of fenbendazole for 5 days “Power pack” Panacur or ivermectin
What was the most common cause of colic before ivermectin?
Strongylus vulgaris causing thrombophlebitis colic
What worm can be in the SI, LI, and/or in the stomach?
Tapeworms (Cestodes)- can cause colic in ileocecal junction of horses
are common in pastures
Anoplocephala is the most common type
what causes these larval cyathostominosis from small strongyles??
How should we Tx it?
Low white cell count, low albumin, ventral edema, profuse watery diarrhea (aka Typhlocolitis), Tx with NSAIDs, Power pack (double dose of fenbendazole for 5 days), and hydrating the patient/ IVC fluids
what is the most popular type of cestode (Tapeworm)??
Anoplocephala- can cause ileocecal colic because thickens the ileum
what bloodwork findings do we usually see with larval cyathostominosis/hypobiosis from small strongyles????
Neutrophilia & hypoalbuminemia on bloodwork
How can we not use fecal egg counts/floats are a diagnostic tool for small strongyles creating larval cyathostominosis?
They do not migrate outside of the colon/cecum wall
