PZV, or Pseudomonas aeruginosa virulence factor, refers to various components produced by the bacterium Pseudomonas aeruginosa that contribute to its pathogenicity. These factors include toxins, enzymes, and biofilm-forming abilities that enhance the bacterium's ability to cause infections, particularly in immunocompromised individuals. PZV plays a crucial role in the bacterium's survival in hostile environments and its resistance to treatments, making it a significant concern in medical settings.