Congratulations! you have just been hired as a nurse in a highly rated state of the art hospital. This is your first week at work and a report is released indicating that a gram-negative bacterium Pseudomonas aeruginosa was found on hospital sinks in a neonatal intensive care unit. P. aeruginosa can cause pneumonia or septicemia in vulnerable individuals like newborn babies. Two premature infants are confirmed to be infected and are now exhibiting pneumonia symptoms. From this scenario, what is this type of infection acquisition called? What factors support your answer? How can this type of infection be prevented?