Corneal infection is manifested as corneal fungal moss or ulcers, subcutaneous tissue type dark filamentous mycosis can be seen in the subcutaneous tissue with thin pus, cysts with exudate, if the cyst wall excision is incomplete, leaving a sinus tract, can not heal for a long time. Dark filamentous mycosis is a group of dark fungi caused by the tissue with dark mycelium as a characteristic of the skin, subcutaneous tissue or systemic infection. 1974 Ajello proposed this name. Dark filamentous mycoses have been reported in scattered cases around the world, but are mostly seen in the tropics. What are the examination methods for corneal with fungal moss or ulcers? 1, fungal examination Take a variety of different damage at the pus and tissue fluid, after treatment with 10% potassium hydroxide solution, microscopically visible in a variety of different forms of brown and black-brown mycelium with yeast-like spores, not seen thick-walled spores (wall brick-like body). Take the tissue and pus culture, can grow brown and black fluffy-like or yeast-like colonies. 2, HE staining HE staining can be found in the majority of separated, black-walled mycelium, 1.5 to 3 & micro;m in diameter, occasionally see branchable or yeast-like budding spores, mycelium surrounded by inflammatory cells or multinucleated giant cells infiltration, no thick-walled spores (wall brick-like body). 3, histopathological examination biopsy can be seen in the subcutaneous tissue with thin pus, cysts with exudate, if the cyst wall excision is incomplete, leaving a sinus tract. According to the performance of skin lesions, fungal examination and histopathological examination is not difficult to diagnose. Patients are most often seen working outdoors and in frequent contact with such putrefactive materials. They may present as shallow ulcers, petechiae, brownish-black spots or wart-like growths, and may be slightly itchy or mildly distended, with or without any conscious symptoms. Subcutaneous tissue type dark filariasis often has isolated, deep subcutaneous or muscle abscesses or cysts, lesions can be apricot kernel size or several centimeters, or even the entire chest large plaques. Systemic dark filariasis this type can be caused by the skin or subcutaneous tissue dark filariasis spread to the lymph nodes, lungs, brain and gallbladder, etc., but also no skin damage, the initial lymph node or blood dissemination.