INTRODUCTION Dermatophytosis is the most prevalent infectious skin disease in the population and can occur in both healthy and immunocompromised patients with a high recurrence rate. Because the clinical manifestations of dermatophytosis are sometimes similar to those of other skin diseases such as seborrheic dermatitis, psoriasis, candidal intertriginous eruptions, erythrodermatitis, and eczema, its clinical diagnosis can be more difficult in immunocompromised patients. The current traditional methods for identifying dermatophytes are mainly morphological, including direct observation under the microscope and fungal culture. Our device targets α-1, 6 mannose in fungi. It has broad-spectrum immunogenicity for common dermatophytes, and can effectively and rapidly detect dermatophytes such as Trichophyton spp., Microsporum spp. and epidermophyton.Instructions