“Colorful and unusual patterns pictures are what photographer Erno-Erik Raitanen calls self-portraits. The pictures, which Raitanen says are more like photograms, involve no camera, some photographic film, and bacteria.

The series, called Bacteriograms, is a display of Raitanen’s own body bacteria cultivated on the gelatin surface of film negatives, much like bacteria is grown in Petri dishes in a laboratory setting.”

from petapixel.com