The first "Acinetobacter" was found in the soil by M.W. Beijerink in 1911. Since then, it has also been found in water, animals, and humans. "A. baumannii" are often found in hospitals and makeup almost 15% of infections that are transmitted in hospitals.  "A. baumannii" target moist environments. The respiratory tract, blood, open wounds, skin, and eyes are all possible sites of infection.