Assessing whole-host homogenisation as a new tool for parasite detection and identification

Area of Science:

• Ecology
• Parasitology
• Biodiversity Monitoring

Background:

• Parasites are crucial for ecosystem functioning but are often overlooked in biodiversity studies.
• Current methods for parasite detection are time-consuming, labor-intensive, and require specialized knowledge.
• Methodological challenges hinder accurate and efficient parasite identification.

Purpose of the Study:

• To evaluate a novel method for parasite detection using whole-host homogenization and DNA-based identification.
• To determine the feasibility and efficiency of this approach as a complementary tool for parasite studies.
• To assess if this method allows for holistic parasite scans with reduced taxonomic expertise.

Main Methods:

• Analysis of five European eel specimens as model hosts.
• Morphological identification of parasites.
• Whole-host homogenization of parasites and host tissue using a blender.
• DNA barcoding with parasite-specific primers for molecular identification.

Main Results:

• Successful detection of all morphologically identified parasite taxa after homogenization.
• Identification of parasites missed during initial morphological examination.
• Acanthocephalans showed lower detection rates with molecular methods.
• The method demonstrated high potential for efficient and accurate parasite detection, sometimes exceeding morphological identification.

Conclusions:

• Whole-host homogenization followed by DNA analysis is a promising, time-efficient method for parasite detection.
• This approach can enhance biodiversity monitoring and parasite recognition, even with limited expertise.
• Further development, including DNA metabarcoding, could improve reliability and parasite assessment.