Multiple choice The infective stage of Plasmodium in humans is: Sporozoite Trophozoite Gametocyte Merozoite None of these Reveal answer Fill a bubble to check yourself A Correct answer Explanation The infective stage of Plasmodium (malaria parasite) transmitted to humans through mosquito bite is the sporozoite. Sporozoites are injected from mosquito salivary glands, enter the liver, and develop into merozoites which infect red blood cells.