My dad was admitted into a hospital approx. 3 1/2 weeks ago. He had fell asleep in the bathtub, and was literally able to walk and talk. His health has declined in the hospital, and they had been telling us he had an infection in his blood, which they were treating with antibiotics. Today, we find out he has a staph infection, and cannot walk, talk, eat, or drink on his own. How can a staph infection cause all of these if he is being treated as an inpatient?