Chromobacterium violaceum, a violet pigmented Gram negative bacterium,  constitute an important link among water and soil microbial system. Few of its properties has been utilized for commercial purpose such as antibiotic aztreonam, many still remain unexplored. We report here the series of events leading to the rupture of three protozoal species when incubated with C. violaceum as observed under microscope. Such type of cell rupture has never been reported in literature.