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Gram-negative rods, mostly E. coli, are the most prevalent bacteria in our guts. Most E. coli are normal flora, only a few strains are pathogenic. Lactobacilli, which are gram-positive rods, are also in our guts.

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14y ago
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13y ago

Escherichia coli.

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15y ago

Escherichia coli

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Q: What bacterial species is the most common that normally inhabits the human intestines?
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