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One lives in the soil and the other, first identified in 1844, is called Sarcina ventriculi and was known to cause gastrointestinal symptoms in humans and animals like those the Tacugama chimps suffered.

The researchers proposed in their paper that the new species be named Sarcina troglodytae, because it was found in chimpanzees, Pan troglodytes.

In humans, Sarcina ventriculi can thrive after surgery and produce gas that fills the walls of the intestine.

So far, the research has not found the bacteria to be the sole cause of the disease, but it has opened a new window on the bacterial genus Sarcina, which may include more unidentified species that threaten the health of humans and animals.

That indicated that it belonged to the genus Sarcina, which had included only two known species.