The invention discloses a modularized
pathogenic microorganism targeting fluorescent probe, an
antibacterial drug delivery
oligopeptide and a preparation method and application thereof, the probe is composed of the following functional modules: a chemotactic module: formyl-D-Phe-Leu-D-Met, which realizes active migration to an infectious
inflammation microenvironment by combining with a
formyl peptide receptor; the targeting module comprises D-Trp-D-Trp-Arg and RWWR which are specifically combined with the surfaces of the pathogenic microorganisms through cationic interaction and hydrophobic interaction; the
fluorescence activation module is a double Cy5.5
fluorophore which is covalently connected through
lysine side chain amino; and the connection and stability module is a PEG4-GGSG flexible
linker, has C-terminal amidation and key site D-type
amino acid modification, and is used for enhancing the stability of the probe. The probe can actively migrate to an infectious
inflammation microenvironment, is specifically combined with the surface of pathogenic microorganisms, and triggers
fluorescence activation after combination, so that accurate imaging of an infected part is realized.