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Surprisingly, they found that one bacterial species, Streptococcus mitis, tended to dominate in certain patients with IPF who were not treated with antibiotics.

Streptococcus mitis tends to act as a gatekeeper toward other bacterial threats, including those that can cause periodontal disease, he said.

The team notably did not find the same protective relationship between oral Streptococcus mitis and IPF in patients who had received antibiotics.

At least one bacterial species, Streptococcus mitis, found its way inside the Surveyor 3 camera that had spent some 2.5 years on the moon before the astronauts of Apollo 12 retrieved and returned it to Earth.

Experts now believe Surveyor 3’s S. mitis came from post-return contamination by human investigators, rather than surviving lunar conditions.