The Head of the Laboratory of Pathological Anatomy and Tissue Preservation, Candidate of Medical Sciences, senior pathologist of the highest qualification category, Oleksandr Valentynovych Artiomov, presents the results of the study:

“Previously Unknown Morphological Manifestations of Demodex Infection in Ophthalmic Practice”

Current understanding of the role of the mite Demodex in ophthalmology is traditionally limited to its involvement in the development of inflammatory processes of the eyelids and conjunctiva. Diagnostics in such cases is mainly based on clinical and laboratory examination of eyelashes with detection of the parasite in its native form.

However, the conducted research demonstrates a significantly broader spectrum of pathological changes associated with the presence of the mite as a commensal organism on the surface of the eyelids and within the conjunctiva. These changes remain poorly recognized in ophthalmic pathology, which necessitated reference to developments in veterinary pathology, where demodicosis has been studied in much greater depth.

A particular challenge is the fact that in histomorphological analysis of biopsy or surgical material, the parasite is in most cases not directly visualized. Therefore, establishing a link between the morphological picture and demodectic involvement requires knowledge of specific histomorphological features that were previously interpreted as insignificant or as artifacts.

Key findings of the study:

• Previously undescribed post-demodectic morphological changes in ocular tissues were identified;
• Characteristic structures were described, including cystic  tracts at sites of tissue destruction;
• amorphous material within foci of mummified Demodex remnants were detected;
• The possibility of preservation of tissue fragments (including tumor tissue) alongside post-infectious changes was demonstrated.

Scientific significance:

The obtained results expand the diagnostic criteria of demodex infection in ophthalmology and emphasize the importance of a histomorphological approach for detecting hidden forms of ocular involvement.

The study opens new perspectives for:

• clarification of the pathogenesis of ophthalmic diseases;
• improvement of morphological diagnostic accuracy;
• development of an interdisciplinary approach, including ;insights from veterinary pathology.