LA2: Equine Parasites

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What parasite most is the most common large strongyle?

Strongylus vulgaris
Where does Strongylus vulgaris travel to for 6 mo?

mesenteric artery
Symptoms of Strongylus vulgaris:ITCD
- itis
- thrombosis
- colic
- death by impaction
What do large strongyle eggs resemble?

hookworm eggs
How many species of small strongyles affect horses?
What is the most common one?
- >50 species
- Cyathestones
Do small strongyles migrate?

no
Where are small strongyles found then?

they encyst in the cecum and can become dormant
How do dormant small strongyles react to dewormers?

they are not affected making them hard to kill
What are the symptoms of small strongyles?
- d+
- colic less common
What is the threadworm of horses?

Strongyloides westeri
Symptoms of Strongyloides westeri:DROS
- D+
- rare w/ adults
- only activated w/ lactation\
- self limiting
MOI Strongyloides westeri

ingestion of milk or feces
Who commonly gets Strongyloides Westeri?
- foals 2-4 mo
- immunity w/ age
What is the equine roundworm?

Parascaris equorum
Symptoms of Parascaris equorum?CPID
- C+
- pneumonia
- intestinal blockge
- dec performance
MOI Parascaris equorum

c+ up and swallowed
Who gets Parascaris equorum?

horses < 2yrs
What is the pinworm of horses?

oxyuris equi
The female of Oxyuris ewui lives in the _ and migrates out to the _ to lay eggs on the _.
- cecum
- sphincter
- rectum
Symptoms of Oxyuris equi:RI
- rat tail
- itching
Dx for Oxyuris equi

cellophane tape
There are 3 types of tapeworms found in the horse, but which is the most common?

Anocephala perfoliata
Where does Anocephala perfoliata attach?

the ileocecal junction
Symptoms of Anocephala peroliata:IC

impaction colic
MOI of Anocephala perfoliata

mites in hay/grass
What is the name of the fly that causes Bots?

Gastrophilus intestinalis
Symptoms of Gastrophillus intestinalis:SUMMP
- stomach irritation
- ulcers
- melena
- mouth irritation
- pain
With bots the horse licks the eggs of of their hair and the eggs hatch in its mouth and migrate to......

the stomach
Onchocerca is what?

a nematode
What is onchocerca of horses?

Onchocerca cervicalis
How in Onchocerca cervicalis spread?

insects
Where is the dermatitis caused by Onchocerca cercicalis found?

ventral midline and face
What is another symptom of Onchocerca cervicalis?

uveitis/ moon blindness
Where does Onchocerca cervicalis live before it travels to the dermis?

nuchel ligament of the neck

Author

heather.dundas

247148

Card Set

LA2: Equine Parasites

Description

VTI

Updated

2013-11-16T13:43:27Z

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