Hi, Welcome to HCM. Pseudomonas aeruginosa is a gram negative bacteria which commonly causes infections of the urinary tract and open wounds. It is one of the most common organism causing hospital associated infections. Any bacterial infection is contagious and precautions are to be taken when dealing with the patient. The Pseudomonas causing infection in your husband seems to be sensitive to the antibiotics prescribed. Please continue the antibiotics and complete the course. You have not mentioned the type of infection, as precautions vary accordingly. I hope I have helped you with this answer. Wishing him a speedy recovery. Thanks.