microorganisms round microbiology outline

allergen amoeba analysis bacillus background bacteria bacterial bacteriology bacterium bad biology cell chemical cholera circle circular collection color concept contaminant contaminants danger dangerous design discovery diseased dust education epidemiology formula germs graphic health healthcare hygiene icon illustration infected infection influenza isolated line linear logo macro medical micro microbe microbiological microbiology microorganism microorganisms minimal mirco modern molecular molecule oraganism outline pandemic pathogen pathogenic poster research round science shape sick sign small spore style substance symbol technology thin vector