<prompt> Which of the following genital infections carries the highest risk for preterm delivery: March 2005Trichomonas vaginitisMonilial vaginitisBacterial vaginitisHuman papilloma virus  <response>: Ans. C: Bacterial Vaginitis Bacterial vaginosis increases the risk of preterm bih and premature rupture of membranes. It is also associated with infection of the placenta chorioamnionitis and post-cesarean infection. 