Quantifying Spirorchiid Eggs in Splenic Histological Samples from Green Turtles

Area of Science:

• Veterinary parasitology
• Marine animal health
• Epidemiology of infectious diseases

Background:

• Spirorchiid infections pose a threat to sea turtle populations.
• Accurate quantification of parasite burdens is essential for epidemiological studies.
• Existing methods for quantifying Spirorchiid eggs in turtle tissues are often laborious or lack precision.

Purpose of the Study:

• To develop and validate a novel, efficient methodology for quantifying Spirorchiid eggs in sea turtle tissues.
• To compare the accuracy and efficiency of the proposed method against traditional quantification techniques.
• To establish a reliable metric for assessing Spirorchiid infection severity in sea turtles.

Main Methods:

• A new method was developed to quantify Spirorchiid eggs based on the number of eggs per unit area (eggs/mm²) of tissue.
• This novel method was compared to the traditional method of counting eggs per gram (eggs/g) of tissue.
• Correlation analysis was performed to assess the relationship between the different quantification methods.

Main Results:

• Both the proposed eggs/mm² method and the common eggs/slide metric showed good correlation with the gold standard eggs/g method.
• The eggs/mm² method demonstrated a stronger correlation with eggs/g compared to the eggs/slide method.
• This suggests that eggs/mm² is a more representative metric for Spirorchiid egg burden in turtle tissues.

Conclusions:

• The proposed methodology of quantifying Spirorchiid eggs per tissue area (eggs/mm²) provides a more efficient and accurate approach for assessing parasite burdens in sea turtles.
• This method offers a valuable tool for future epidemiological research on spirorchiid infections in marine reptiles.
• Adoption of the eggs/mm² method can improve the standardization and reliability of parasite quantification in veterinary diagnostics.