Carbapenems are a type of antibiotics that have been used to treat "Acinetobacter baumannii" infections. These antibiotics are effective in treating infection. However, "A. baumannii" can develop tolerance to this antibiotic. This tolerance makes it harder to treat infections. Carbapenems-resistant "A. baumannii" can spread their tolerance to other types of bacteria. This is dangerous in healthcare settings because if many bacteria are tolerant to carbapenems, the antibiotic cannot be used to treat infections anymore. "A. baumannii" can be tolerant to multiple antibiotics making infections difficult to treat.