Alcaligenes faecalis is a species of Gram-negative, rod-shaped bacteria commonly found in the environment.

It was originally named for its first discovery in feces, but was later found to be common in soil, water, and environments in association with humans.

Although A. faecalis is considered to be alkali-tolerant, it maintains a neutral pH in its cytosol to prevent the damaging or denaturing of its charged species and macromolecules.

[3] In 2024, researcher Ellen White of the University of Pennsylvania found that Alcaligenes faecalis can help treat chronic wounds heal faster.

The results showed the wounds treated with the bacteria healed faster and produced keratinocytes.