Large Strongyles and Bloodworms

Large Strongyles: The most dangerous equine parasites

by Robert N. Oglesby DVM

Introduction

Introduction » Description » Life Cycle of Large Strongyles » Diagnostic Information » Effect on Host » Significance » Location » Treatment » More Info & Discussions

Unchecked large strongyles, also called blood worms, limit the life span of horses. Over years chronic damage to the organs and particularly the arteries feeding the bowel with blood build up and through aneurysm or infarction result in an acute lethal colic. This article discusses the life cycle and diagnosis of this parasite including photos of all the life stages, and has links to treatment of these parasites. I would like to thank MSD-AgVet and Merck, makers of Eqvalan, for use of these photos.

Description

Introduction » Description » Life Cycle of Large Strongyles » Diagnostic Information » Effect on Host » Significance » Location » Treatment » More Info & Discussions

Reddish-brown to black in appearance because of the blood they ingest as they feed on the intestinal mucosa. Commonly referred to as "bloodworms" adults found in the feces range in size from 3/4 inch to 2 inches.

The Life Cycle of the Roundworm

Introduction » Description » Life Cycle of Large Strongyles » Diagnostic Information » Effect on Host » Significance » Location » Treatment » More Info & Discussions

                       
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