Pathological changes caused by Anoplocephala perfoliata in the mucosa/submucosa and in the enteric nervous system of equine ileocecal junction.

The research investigates the pathological changes caused by Anoplocephala perfoliata, a type of parasite, in a part of the horse’s digestive system known as the ileocecal junction and how this impacts the horse’s enteric nervous system.

Objective of the Study

• The main objective of this study was to understand the pathological changes that Anoplocephala perfoliata, a type of equine tapeworm, causes in the ileocecal junction – the point where the small intestine and the large intestine meet – of horses.
• The team of researchers wanted to evaluate the relationship between the degree of parasite infestation and the severity of the histopathological lesions observed in the mucosa (inner lining) and submucosa (a layer of tissue under the mucosa) of the affected horses.
• Further, the study aimed to assess the impact of the infection on the enteric nervous system, which regulates the function of the gastrointestinal tract.

Methods and Results

• Researchers carried out their study on 31 mixed-breed horses that were slaughtered regularly, of both sexes.
• A significant finding of the study was the existence of a remarkable relationship between the parasite burden and histopathological lesion grading in the mucosa and submucosa. This means that as the degree of infestation increased, so did the severity of the injury to the tissues.
• Hypertrophy, or abnormal enlargement, of the circular muscle layer was noticed in the infected horses.
• Upon evaluating the enteric nervous system, it was discovered that horses with moderate to high parasitism demonstrated significant damage to the intestinal nervous elements.
• This injury was marked by an increase in degenerative-regressive changes in neuronal cells along with a decrease in the number of myenteric ganglia (clusters of nerve cell bodies) and neuronal cells.

Conclusions and Implications

• The findings of this research provide valuable insight into the pathogenesis, or the biological mechanism that leads to the disease, of intestinal motility disorders associated with Anoplocephala perfoliata infection in horses. In other words, understanding these changes can help determine the cause of the condition and develop effective treatment plans.
• The study highlights the severity of damage that can be caused by this type of tapeworm and denotes the importance of prevention, timely detection, and treatment of parasite infections in horses to protect their health and wellness.