diplobacillus or staphylococcus bacterial microorganisms

art bacillus bacteria bacterial bacterium biology cartoon cell creature danger dangerous design diplobacillus disease element epidemic flat germ health ill illness illustration infection infectious isolated medical medicine micro microbe microbiology microorganism microscopic mold molecule organism pandemic pathogen probiotic protist protozoa rodshaped science sick sickness small spherical staphylococcus streptococci vector virus