The encysted stage of a monoecious trematode found in the
tissue of the second intermediate host in the life cycle which
may be the infective stage to man or other animals.
The stage in the life cycle of a parasite that is infective to its
The cystic stage of a parasite that is infective to its host.
A former division of the animal kingdom which includes all
The first-stage larva of the filariid nematodes in the blood or
tissue fluids of man or other definitive hosts.
The male differentiated form of the malarial parasite which,
when ingested by the mosquito, becomes a microgamete.
Slender, elongated bodies of the apical complex that join a
duct system with the rhoptries, opening at the anterior end of
a sporazoite or merozoite.
In the ciliates, the smaller of the two types of nuclei; which
carries the genetic components of the cell.
A minute pore in the cell membrane of certain protozoa
Ultra microscopic structures just beneath the cell membrane
of certain protozoa which contribute to the supportive
The free-swimming larva which emerges from the egg of a
trematode as it hatches, and which penetrates (or is
ingested by) the snail host.
Ultramicroscopic cytoplasmic inclusions which are the sites
of intracellular aerobic metabolism (respiration) of protozoan
and many other cells. They bear the enzymes of oxidative
phosphorylation and the tricarboxylic acid cycle.