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Rank abundance of the top five operational taxonomic units (OTUs, in red numbers) found in spirulina-containing foods and supplements, and in two culture media (plate count agar (PCA) incubated aerobically, and reinforced clostridial agar (RCA) incubated anaerobically, both at 30 °C). Percentage values indicate the cumulative relative abundance of the top five OTUs in each sample. Filled bars are proportional to the abundance ranking number (smallest bar = top of ranking).
