type of bacteria (pl) type of bacteria (sg) shape examples of bacteria disease cocci infections characterized by boils (vředy) pneumococcus gonorhea (kapavka) bacilli bacillus E-coli spirillum triponema pallidum mycoplasma twisted into fantastic shapes BACTERIA Another way of distinguishing bacteria is a staining _______________ that divides bacteria into two major _______________ based on chemical differences in their cell walls: gram-positive _______________ retain the dark violet colour of the stain after the decolorizing treatement while gram-negative _______________ lose the stain. Based on: http://video.google.com/videosearch?q=video+bacteria+shape#