Q20. Adult O. volvulus worms have a long life span and can persist within a human host for 10+ years. The O. volvulus genome encodes virulence factors that enable the worm to evade host immune responses. For example, the ov-par-1 gene encodes a protein (Ov-PAR-1) that is displayed on the surface of adult worms and disrupts the complement cascade. Select the correct statement/s. (select all that apply)