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The peritrophic membrane of Ixodes ricinus
1Institute of Zoology, University of Neuchătel, Switzerland.
Parasitology Research
|January 1, 1991
Summary
The peritrophic membrane in ticks (Ixodes ricinus) forms within 18 hours of feeding and remains intact for days. Its thickness and structure change significantly after blood meal repletion.
Area of Science:
- Veterinary Entomology
- Parasitology
- Tick Biology
Background:
- The peritrophic membrane is a crucial component of the insect midgut, acting as a barrier.
- Understanding its structure and dynamics in disease vectors like Ixodes ricinus is vital for vector control.
Purpose of the Study:
- To investigate the formation, integrity, and structural changes of the peritrophic membrane in Ixodes ricinus across different life stages.
- To quantify the thickness and spatial relationship of the peritrophic membrane to the midgut epithelium before and after blood feeding.
Main Methods:
- Light microscopy was used to observe the peritrophic membrane in larvae, nymphs, and adult females of Ixodes ricinus.
- Measurements of membrane thickness and distance to the midgut epithelium were taken at various time points post-repletion.
Main Results:
- The peritrophic membrane formed within 18 hours of feeding in all Ixodes ricinus stages.
- It remained intact for 10-30 days post-repletion, varying by life stage.
- Post-repletion, the membrane thickened, became multi-layered, and increased its distance from the midgut epithelium, especially in nymphs and females.
Conclusions:
- The peritrophic membrane of Ixodes ricinus exhibits dynamic structural changes post-blood meal, adapting to engorgement.
- These changes, including thickening and increased distance from the epithelium, may play a role in digestion and nutrient absorption or barrier function in replete ticks.