abstract bacteriology icons

abstract acid acidophilus bacillus background bacteria bacterial bacteriology bacterium bifidobacteria bifidobacterium biological biology bulgaricus cell colony design digestion fermentation flora food germ health healthy icon illustration isolated lactic lactobacillus lactococcus logo medical medicine micro microbe microbiology microorganism microscopic organism positive prebiotic probiotic probiotics propionibacterium sign stomach streptococcus symbol thermophilus vector white yogurt