Virulence factors Adhesins: pili and nonplus adhesins Production of neuraminidase enhances adherence Alginate(mucoid layer): Protects against phagocytosis and facilitates adherence to host cells BIOL 533 Lecture 13BIOL 533 6 Lecture 13 Virulence Factors • Adhesins: pili and nonpilus adhesins – Production of neuraminidase enhances adherence • Alginate (mucoid layer): Protects against phagocytosis and facilitates adherence to host cells