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.
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Did you know that 90% of the cells in (or on) the human body are bacteria and other microorganisms? Have you ever thought about how many bacteria live on your DSLR camera? Chicago Tribute staff photographer Alex Garcia recently dove into this second question while visiting the Argonne National Laboratory outside Chicago.
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