Polarizable elements in scabies infestation: a clue to diagnosis.

Autor: Foo CW; Department of Dermatology, University of Utah, Salt Lake City, UT 84132, USA., Florell SR, Bowen AR
Jazyk: angličtina
Zdroj: Journal of cutaneous pathology [J Cutan Pathol] 2013 Jan; Vol. 40 (1), pp. 6-10. Date of Electronic Publication: 2012 Oct 30.
DOI: 10.1111/cup.12035
Abstrakt: The diagnosis of scabies infestation is straightforward in cases where mite parts are largely visible; however, mites are often not captured in a specimen's planes of section. Polariscopic examination is a fast and simple adjunctive diagnostic tool to light microscopy. We describe the unique polariscopic findings in scabies infestation. Two cases of crusted scabies and eight cases of typical scabies were subjected to polariscopic examination. Diagnostic mite parts were visualized in at least one section in all cases. Attached and detached spines as well as scybala (fecal material) are polarizable. Specifically, spines show a polarizable outer sheath with dark central core while scybala show peripherally concentrated, stippled birefringence. Similar stippled birefringence is visible within the gut of some mites whereas significant birefringence is not appreciated in other mite parts. These results suggest that polariscopic examination is a helpful clue in the diagnosis of scabies infestation, especially in cases where the body of the mite is not visualized.
(Copyright © 2012 John Wiley & Sons A/S.)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje