<s>[INST] My Grandma is currently in hospital recovering from brain surgery and has had a Tracheotomy and also a line through her stomach for food. I have been told by the hospital that she now has an infection called Citrobacter Koseri, the hospital do not seem to know too much about the infection or what the long term complications could be, she does not currently have a temperature. Is any one able to give me more information on this infection? Is treatable and what are the long term effects of this infection? Also, how is this infection contracted in the first place? [/INST] Citrobacter koseri is a gram negative bacteria found in the body. It can be a commensal and sometimes it can be pathogenic and cause disease. However, the citrobacter infections are rarely deadly. They can be taken care by various groups of antibiotics which can be picked as per the drug susceptibility testing done in the microbiology laboratory. Your grandma will recover, don't worry. </s>