"Acinetobacter baumannii (A. baumannii)" is a pathogenic bacterial species that causes disease in humans. It is commonly found in soil and water. "A. baumannii" is the most important member of the Acinetobacter genus associated with infections gained in hospitals. A."Baumannii is resistant" to a specific class of antibiotic called carbapenems. Carbapenems-resistant "Acinetobacter" infection is common in hospitals and is very dangerous. In 2017, it resulted in an estimated 8,500 infections in hospital patients and 700 deaths in the United States. The World Health Organisation (WHO) released a list of top bacteria pathogens of concern, called ESKAPE pathogens, due to their high levels of antibiotic resistance. "A. baumannii" was named as one of the most dangerous ESKAPE pathogens. In order to treat "A. baumannii" effectively, it is important to understand how it acts as pathogen and its mechanism of antibiotic resistance.