gram positive and gram negative bacteria. coccus, bacillus, curved bacteria in petri dish.

aeruginosa aureus bacilli bacillus bacteria bacterial bacterium biology botulinum bug cell cholerae clostridium cocci coli contaminants disease dish epidemic epidemiology escherichia flat flu germ germs gonorrhoeae gram helicobacter hygiene illness infection inflammatory isolate luteus micro microbe microbiology micrococcus microorganism microscopic mold moniliformis negative neisseria organism palisades palladium pathogen peptidoglycan petri pink positive pseudomonas purple pylory pyogenes research rods science set sickness spherical spore stain staphylococcus streptobacillus streptococcus test treponema vector vibrio violet