Question | Answer |
A skin condition seen in equines that is commonly called summer sores is caused by which parasitic larvae? | Habronema and Draschia species |
Habronema and Draschia species are commonly called what in horses? | stomach worms |
Habronema and Draschia are also found in equine stomachs. True or False | True |
How does the horse become internally infected with Habronema and Draschia? | By accidental ingestion of a Muscidae fly |
The equine roundworm or equine ascarid is also called what? | Parascaris equorum |
Where does the adult equine roundworm live within the body? | small intestine |
How does a horse become infected with Parascaris equorum? | by ingesting infected ova |
What is the life cycle of Parascaris equorum? | eggs passed in feces, egg is ingested by foal, hatches in intestines, larvae migrate to liver thru hepatic portal vein, grow to next stage, then larvae go to lungs in circulation, foal coughs them up, and swallows. Repeat cycle. |
Which of the equine strongyles are the most pathogenic, large or small? | large |
What are the scientific names of the large strongyles of horses? | Strongylus vulgaris, Strongylus edentaus, and Strongylus equinus |
How do we tell the difference in the different species of strongyles in horses? | You can't!! They all look too similiar to each other. That is why we call them all strongyles or you can say "a strongyle type of egg" |
What method of collection is used to collect Oxyuris equi? | tape prep |
What is the common name for Oxyuris equi? | pinworm |
What area of the horse is usually bothered by pinworms? | The tail head and anus and rump |
Why is it rare to find Oxyuris equi ova on a flotation test? | the female attaches her eggs to the anus instead of the eggs being in the feces |
True or False-Stronglyoides westeri only have parasitic male worms. | False--They only have parthenogenetic females!! They don't need a man!!! |
How would the ova of Strongyloides westeri look if it is seen under the microscope? | the ova would have a larvae moving around in it |
What is the scientific name of the equine lungworm? | Dictyocaulus arnfieldi |
Where is the nuchal ligament found in horses? | neck |
What microfilaria can be found in the nuchal ligament? | Onchocerca cervicalis |
Horses infected with Onchocerca cervicalis exhibit patchy alopecia and scaling on the head, neck, shoulders, and ventral midline with severe pruritis and this is commonly called what? | cutaneous onchocerciasis |
What other abnormal condition can Onchocerca cervicalis cause in horses? | blindness and periodic opthalmia |