Some eukaryotic protozoa such as " Leishmania major " and " Trypanosoma cruzi " lack the RNAi pathway entirely.
32.
The paramastigotes range in size from 6 to 10 �m which is within the range for modern " Leishmania " species.
33.
Protozoa serve as natural hosts, and Leishmaniaviruses are present in several species of the human protozoan parasite " Leishmania ".
34.
Molecular studies have cast doubts on this basis for classification and they have been moved to subgenus status within " Leishmania ".
35.
However, in the case of " Leishmania ", these enzymes have no effect, allowing the parasite to multiply rapidly.
36.
When added to autologous leishmania infected macrophages these T cells cause parasite death and secretion of large amounts of interferon-gamma and lymphotoxin.
37.
The big-earled climbing rat has been a subject of study due to a disease caused by Leishmania ( L . ) Mexicana.
38.
It is possible " P . neotropicum " is the ancestor of one or more Neotropical " Leishmania " clades.
39.
In laboratory tests, extracts of the plant were active against the protozoa that cause leishmaniasis, especially " Leishmania major ".
40.
The rate of outcrossing between different strains of " Leishmania " in the sand fly vector depends on the frequency of co-infection.
