20) Protozoa infect different tissues in the animal host and can be transmitted by vectors. Knowing the mechanisms of infection is of fundamental i...

20) Protozoa infect different tissues in the animal host and can be transmitted by vectors. Knowing the mechanisms of infection is of fundamental importance to ensure the adoption of efficient prophylactic measures. The following statements are made about the evolutionary cycle of protozoa of medical importance:

l. The trypomastigote form of Trypanosoma cruzi in vertebrate hosts can be transmitted congenitally.
II. Female sandflies inoculate the promastigote form of Leishmania along with saliva when they feed on mammals - infecting cells of the Mononuclear Phagocytic System.
III. With the exception of Giardia lamblia, whose infective form is the tetranucleated cysts, all species of flagellated protozoa parasites of medical importance
A) Only statement I is correct.
B) Only statement II is correct.
C) Only statement III is correct.
D) Statements I, II, and III are correct.