Recovery of helminths postmortem from equines. II. Helminths and larvae of gasterophilus in the gastro-intestinal tract and oestrids from the sinuses.

This study investigates the presence of certain types of helminths and larvae in various parts of the digestive system and sinuses of horses, including gasterophilus spp. larvae and oestrid larvae, to better understand their prevalence and impact on equine health.

Research Methods

The researchers employed a thorough methodology aimed at examining different areas of interest in the horse’s body. The study focused on:

• The tongue, pharynx, oesophagus, and gums, looking specifically for larvae of gasterophilus spp.
• The nose and sinuses, where they examined for oestrid larvae.
• The gastro-intestinal tract, which they divided into separate sections for individual examination: stomach, small intestine, caecum, ventral colon, dorsal colon, descending colon, and rectum.

Sampling Process

Detailed procedures were carried out to ensure representative samples and accurate findings:

• Altering proportions of ingesta (the content of the digestive tract) were taken from the stomach (1/4 by mass) and the small intestine, caecum, ventral colon, and dorsal colon (1/10 by mass) for microscopic examination.
• Each part of the wall of the caecum, ventral, and dorsal colon was washed and samples taken for subsequent examination.
• Macroscopic examination was performed on the gut wall of the caecum and colon to identify larval stages.
• Gasterophilus larvae were specifically looked for in the ingesta found in the descending colon.

Purpose of the Study

The overall objective of this study was to collect data on the locations and quantities of helminths (parasitic worms) and specific types of larvae within the horse’s body. This would help to better understand their prevalence and potentially devise more effective strategies for their control, leading to improved equine health.