probiotics set concept

probiotic lactobacillus bacteria gut icon bifidobacterium vector good virus bad health bacillus prebiotic acidophilus illustration cell bacterium streptococcus bifidobacteria intestine microbiota food healthy germ microbiome microorganism flora digestion bifidum fermentation medicine thermophilus microbe casei bulgaricus bacterial lactobacilli organ microbiology lacto micro kawaii biology medical supplements human organism set colon