[Fluorescence microscopy detection of mycopathogens using Rylux BSU]

Area of Science:

• Histopathology
• Mycology
• Dermatology

Context:

• Fungal infections pose diagnostic challenges in dermatology.
• Accurate and rapid detection of fungi is crucial for effective treatment.
• Existing histological methods may require lengthy procedures or lack specificity.

Purpose:

• To introduce a novel histological staining method using Rylux BSU for fungal detection in dermatological samples.
• To evaluate the efficacy and characteristics of Rylux BSU as a fluorescent stain for fungi and algae.
• To assess the compatibility of Rylux BSU staining with other common histological preparations.

Summary:

• Rylux BSU, a diaminostilbendisulphonic acid derivative, exhibits affinity for fungal chitin and algal cellulose.
• A 2% Rylux BSU solution in phosphate buffer or NaOH/DMSO effectively stained fungal cell walls, producing yellow-green fluorescence under blue light excitation.
• The fluorescence was stable in Canada balsam and the method was applicable to pre-stained sections, enhancing diagnostic information.

Impact:

• This method offers a quick and reliable diagnostic procedure for identifying fungal elements in dermatological specimens.
• The stable fluorescence and compatibility with other stains increase the utility of Rylux BSU in routine histopathology.
• Potential for improved diagnosis and management of fungal infections in clinical dermatology.