probiotic bacteria cultures under a microscope

and bacillus bacteria bifidobacterium biology coccus colony culture cultures dietary digestion dried fermentation field food for good grampositive healthy human illustration intestinal laboratory lactobacillus lactococcus lifestyle live lyophilized main microbe microbiology microflora microorganisms microscope neutral nutrition probiotic probiotics prokaryote proper species stained strain supplement symbiotic under useful vector view yoghurt