Use of bacterial beta-lactamase for in vitro diagnostics and in vivo imaging, diagnostics and therapeutics Patent uri icon


  • Provided herein are assays and in vitro methods to determine susceptibility to a drug effective against a pathogenic bacteria, for example, a pathogenic Mycobacteria, that has a beta-lactamase activity. An excitation wavelength is delivered to a biological sample obtained from a subject having an infection from the pathogenic bacteria in the presence of a beta-lactamase substrate. The intensity of a signal, such as a fluorescent, luminescent or colorimetric signal, at an emission wavelength of a product of the beta-lactamase on the subject is correlated to drug susceptibility. Also provided is an assay system for monitoring drug susceptibility of a pathogenic bacteria comprising color-producing substrates for a beta-lactamase of the pathogenic bacteria, an assay device for visibly detecting a product of the beta-lactamase on the substrate thereof and a reader configured to quantify the visibly detected product.

author list (cited authors)

  • Cirillo, J., & Rao, J.

complete list of authors

  • Cirillo, Jeffrey||Rao, Jianghong

publication date

  • September 2016