I'm a nursing assistant in the float pool. I got floated today to a med-surg floor. All was going well until I went into a patient's room who was in isolation without a gown. I usually wear a gown and gloves when I'm going to be doing something in contact, otherwise I just went in to pick up the patient's lunch tray. I put it towards the edge of the door, and I was washing my hands. Then, the case manager, not the floor manager, walks into the room and tells me that it's an isolation room and that I need to gown up. I told her I was just picking up the tray and she said I'm breaking the isolation code because I didn't gown up, yet alone, wear gloves. I told her okay. I finished washing my hands. But what she didn't know was, I was going to wear new gloves to bring the tray out. The patient in the room and his wife told me that no one gowned up the entire week he was there. I was putting in the intake for the patient and that lady comes to me again and tells me, I need to follow the protocol at all times. I told her okay. But I see nurses not wearing gowns and only wearing gloves when going into the patient's room to give meds. Or OTHER CASE MANAGERS, DOCTORS, AND SOCIAL WORKERS not following the protocol, yet I"M the one being yelled at???????