Journal of Surgery - JuniperPublishers Mini Review From environment to patient Pseudomonas genus is known and studied from many years and it’s currently widely to the attention in microbiological and in medical clinical area for severe infections occur in patients who are already illness or who have a weak immune system, such as long term hospitalized subject. This bacteria group, normally is isolated in the environment, such as in soil, water, plants and in nosocomial area as well as in veterinary field such as intensive no controlled farming [1]. Pseudomonas spp. represents a Gram negative opportunistic pathogens bacteria group with a great, outstanding adaptability in the different environmental conditions. In fact, recentstudies by using the comparative genomics on different strains of P. aeruginosa isolated in human and veterinary field have identified some key genes involved in the shift environment-status vs. pathogen-status of these bacteria. In particular, these st...