Application of cadmium telluride quantum dot in Shiga toxin detection on immune test strip

The invention discloses a CdTe-STX second antibody complex and a preparation method and an application thereof. The CdTe-STX second antibody complex is obtained by connecting a CdTe quantum dot with aSTX secondary antibody. The invention further discloses applications of the CdTe-STX second antibody complex in preparing a reagent, a test strip or a kit for detecting Shiga toxin. The invention further discloses an immunofluorescent strip based on a cadmium telluride quantum dot and a preparation method thereof. The immunofluorescent strip based on the cadmium telluride quantum dot is high in sensitivity, the detection limit is as low as 5 ng/ml, and the immunofluorescent strip has excellent stability, reproducibility and specificity. In addition, the cost is low, the operation is simple, the specificity is high, the sensitivity is high, the precision is high, the operation is very simple, and the result can be read just by means of an ultraviolet lamp. The immune test strip is of greatsignificance for the on-s