This project aims to determine the bacterial etiology and prevalence of infections due to Carbapenem-Resistant Organisms (CRO) in patients at three hospital settings in Sri Lanka. Investigators are Lana Abusalem, Prof. Ajith Nagahawatte, Prof. Champica Bodinayake, Prof. Gayani Tillekeratne, Dr. Subodha Wickramasinghe, Dr. Bhagya Piyasiri, Dr. Lakmal Fonseka, Prof. Christopher Woods, Mr. Armstrong Obale, Mr. Ishaan Brar