Systems, devices, and methods for visualization of tissue and collection and analysis of data regarding same

A system for determining a bacterial load of a target, comprising:

• an adaptor for configuring a mobile communication device for fluorescent imaging of a target, the adaptor comprising:
• a housing configured to be removably coupled to a mobile communication device, and
• an excitation light source configured to emit excitation light selected to elicit emission of bacterial autofluorescence from bacteria in a target illuminated with the excitation light;
• and
• a mobile communication device comprising:
• an optical sensor configured to detect signals responsive to illumination of the target with the excitation light, and
• a processor configured to:
• receive the signals responsive to illumination of the target with the excitation light and corresponding to bacterial autofluorescence of the target, analyze the signals using pixel intensity, and output data regarding a bacterial load of the target.