* Adhesins: UPEC have specialized adhesins that allow them to attach to the cells lining the urinary tract. This attachment is the first step in establishing a UTI.
* Toxins: UPEC can produce toxins that damage the cells lining the urinary tract, leading to inflammation and pain.
* Proteases: UPEC can produce proteases that break down the proteins in the host's immune response, allowing the bacteria to evade the immune system and establish infection.
* Biofilm formation: UPEC can form biofilms, which are colonies of bacteria that are encased in a protective layer of extracellular material. Biofilms are difficult to treat with antibiotics and can lead to recurrent UTIs.
* Iron acquisition: UPEC have specialized mechanisms for acquiring iron, an essential nutrient for bacterial growth. This ability to acquire iron allows UPEC to survive and multiply in the iron-limiting environment of the urinary tract.
The combination of these virulence factors allows UPEC to cause a range of UTIs, from mild bladder infections to more serious kidney infections.
