Abstract
This study will be to compare and evaluate the action exerted by the laser (L) and the light emitting diode (LED) in spores of Bacillus subtilis and Bacillus atrophaeus in photodynamic therapy, the use of photosensitizers methylene blue (MB), rose bengal (RB) and malachite green (VM). Be used a standard strain of Bacillus atrophaeus (ATCC 9372) and Bacillus subtilis (ATCC 19659). The colo…