Pseudomonas aeruginosa ia an infectious nosocomial bacteria and is will most likely infect persons who are immunocompromised. The pseudomonas aeruginosa bacteria can be found in a number of moist nutrient limited reservoirs in hospitals. Contaminated food and water as well as sinks, showers and breathing/respiratory equipment that have not been properly cleaned are ideal reservoirs for the bacteria to develop. All infections are transmitted directly (from an infected person to a susceptible host ) or indirectly ( from a contaminated surface to a susceptible host). The direct transmission of pseudomonas aeruginosa occurs when a patient who has already been infected come in contact with a patient who is susceptible to the bacteria as well as when health care personnels have not washed their hands properly after coming in contact with either an infected patient or a contaminated reservoir.