Сomparison of the main methods of clinical and laboratory diagnostics of dermatophytosis

Abstract

Relevance. A number of methods are used to diagnose dermatophytosis in the practice of doctors, but their effectiveness varies. The aim of the study was to compare different methods of clinical and laboratory diagnosis of dermatophytosis.Methods. 54 clinical hair samples taken from small pets were examined for the presence of dermatophytes. Diagnostics was carried out using a Wood lamp, direct microscopy, fluorescent microscopy with calcofluor, and by sowing on nutrient environment — Saburo and DTM.Results. When sowing, 16 dermatophytes were isolated from 54 wool samples. The efficiency of the “DTM-Expert” environment was 100%. 13 (81.3%) dermatophytes grew on the Saburo environment, of which 2 crops were heavily contaminated with mold fungi. In the study of wool with the help of Wood’s lamp, 62.5% (10 out of 16) ofpositive samples were detected. False positive —16.7% (9 out of 54). Using direct microscopy, dermatophytoses were confirmed only in 56.3% (9 out of 16) ofcases. False positive results — 7.4% (4 out of 54). Microscopy with calcofluor revealed the causative agent in 15 cases, which is 93.8%. At the same time, there were 5 (9.3%) false positive results.