Antiparasitic potential of Caesalpinia coriaria: Current evidence and prospects for equine health.

Objective Overview

• This review article examines the potential of Caesalpinia coriaria pods as a natural antiparasitic treatment for horse gastrointestinal parasites.
• It highlights current evidence mainly from laboratory tests on ruminant parasites and identifies knowledge gaps that must be addressed before practical equine applications.

Background and Importance

• Parasitic infections pose a significant health and performance problem for horses worldwide.
• The development of resistance to conventional anthelmintic drugs has become a major challenge, prompting the search for alternative or complementary parasite control methods.
• Integrated parasite management strategies aim to combine chemical, biological, and management approaches to reduce reliance on synthetic drugs.

Caesalpinia coriaria and Antiparasitic Potential

• Caesalpinia coriaria, commonly known as Divi-divi, produces pods rich in tannins—plant compounds known for bioactive properties.
• Tannins have been associated with antiparasitic effects, particularly against gastrointestinal helminths.
• Research has explored the use of C. coriaria pod extracts as a natural source of anthelmintic compounds.

Current Evidence from Research

• Most data are derived from in vitro experiments using parasite models affecting ruminants, especially Haemonchus contortus, a well-studied nematode.
• These studies show that extracts of C. coriaria pods inhibit egg hatching and larval development in a dose-dependent manner.
• The consistent results from these assays suggest bioactive potential against helminth stages critical for parasite transmission and survival.
• However, these promising findings are limited to laboratory settings and ruminant parasites, not specifically horse parasites.

Gaps and Limitations

• Lack of in vitro studies directly targeting equine gastrointestinal parasites such as cyathostomins and Parascaris species.
• Absence of rigorously controlled in vivo trials in horses assessing safety, effective dosing, and formulations of C. coriaria extracts.
• Unresolved issues include:
  • Standardization of extract preparation to ensure consistent tannin content and bioactivity.
  • Optimal dosing regimens that balance efficacy and safety.
  • Potential toxicity or adverse effects on equine health.
  • Understanding efficacy against the specific parasite species affecting horses.

Future Directions and Recommendations

• The review stresses the need for equine-focused research to translate current findings into practical use.
• Suggested priorities include:
  • Developing standardized protocols for extract preparation and chemical characterization.
  • Conducting targeted in vitro assays against horse-specific parasites.
  • Designing controlled in vivo studies to evaluate efficacy, safety, and optimal administration strategies.
  • Investigating potential integration of C. coriaria-based treatments into broader integrated parasite management programs for equines.
• Addressing these priorities will help determine whether C. coriaria can be a viable, natural antiparasitic tool to combat the growing problem of anthelmintic resistance in horses.