HS internal parasites questions

An infestation of Roundworms can likely cause intestinal obstruction due to their large size. Where are these internal parasites found in the horses gi tract

Small intestine (duodenum and jejunum)

At what age should foals be deworms for ascarids and threadworms

2-3 months

Excessive use of deworming agents or anthelmintics leads to what issue

Resistance

Grazing horses near cattle may lead to infection with what parasite

Hair worms

Habronema’s intermediate host is the house fly and stable fly. How do these flies cause summer sores on horses

They carry the larvae of the habronema to an open area on the horse. The larvae then burrow causing irritation. The horses lick the irritated area and ingest the habronema causing the cycle to start again

Horses housed near donkey’s may be more likely to become infected with what parasite

Lungworms

How often are fecal exams recommended in adult horses. Once annually. Typically, in the spring.

Large strongyles have three species. Name them. S. Vulgaris, S. Equinus and S. Edentatus

Name the test that can be done to test for resistance of internal parasites. Fecal egg reduction test (it is calculated for a group of at least 6 horses based on pretreatment and post treatment EPG)

Over 50 species of this parasite exist in horses. The larvae invade the walls of the large intestine. They are also known as Cyathostomes. Small strongyles

Oxyuris Equi is also known by what common name

pinworms

Praziquantel is the recommended deworming agent for what internal parasite

Tapeworm

Provide the term for the worms that are not exposed to a given drug at time of treatment. Worms in refugia

The fecal threshold goal is what range

100-500 EPG 150-200 is common goal

These are flatworms that live at the ileocecal valve of the horse. Tapeworms

This internal parasite is the largest found in the horses gi tract. It can grow up to more than 30 cm in length and foals are more prone due to the development of immunity as the horse ages. Ascarids, Roundworms, Parascaris equorum

What are the most common internal parasites found in horses

Strongyles

What internal parasite is also referred to as blood worms and why

Strongylus vulgaris as they can travel to the mesenteric artery causing thrombosis

What is meant by the term Rotational deworming

Deworming based on the season

What is the intermediate host of the tapeworm

Oribatid mite

What temperatures cause the larvae of small strongyles to die and eggs to not hatch

Above 100 and below 40

When performing a fecal egg reduction test what does a score of less than 80 indicate

resistance

Where are large strongyles found in the horses GI tract

Large intestine