A New Optical Fiber Probe-Based Quantum Dots Immunofluorescence Biosensors in the Detection of .

() is one of the most common clinical pathogenic bacteria with strong pathogenicity and usually leads to various suppurative infections with high fatality. Traditional bacterial culture for the detection of is prone to diagnosis and antimicrobial treatment delays because of its long-time consumption and low sensitivity. In this study, we successfully developed a quantum dots immunofluorescence biosensor for detection. The biosensor combined the advantages of biosensors with the high specificity of antigen-antibody immune interactions and the high sensitivity and stability of quantum dots fluorescence. The results demonstrated that the biosensor possessed high specificity and high sensitivity for detection. The detection limit of reached 1 × 10 CFU/ml or even 1 × 10 CFU/ml, and moreover, the fluorescence intensity had a significant positive linear correlation relationship with the logarithm of the concentration in the range of 10-10 CFU/ml (correlation coefficient = 0.9731, = 0.011). A specificity experiment showed that this biosensor could effectively distinguish (1 × 10 CFU/ml and above) from other common pathogenic (non-) bacteria in nosocomial infections, such as , , and . Additionally, the whole detection procedure spent only 2 h. In addition, the biosensor in this study may not be affected by the interference of the biofilm or other secretions since the clinical biological specimens are need to be fully liquefied to digest and dissolve viscous secretions such as biofilms before the detection procedure of the biosensor in this study. In conclusion, the biosensor could meet the need for rapid and accurate detection for clinical application.