0 any of various types of very small animals with one cell: --
1 used to refer to any of various types of very small animals with one cell; involving or relating to this type: --
When the temperature reached 32-degrees-F all protozoan activity ceased.
Toxoplasmosis is an infection caused by a protozoan parasite found in undercooked meat.
2 a very small organism with only one cell --
This characteristic has also been found in other protozoan parasites.
Diversity of both helminths and protozoans was higher in the squares.
These are possibilities that have long been considered for protozoan infections.
Populations consist of a few major clones with some closely related ones - a structure found for several parasitic protozoans and bacteria.
One way for bacteria to resist protozoan grazing is the production of secondary metabolites.
This is likely to be the case whether the infective agent is microbial or protozoan.
This suggests that, despite inhabiting the hostile environment of the bloodstream these protozoan parasites successfully evade the host immune response, leading to chronic infections.
This antigen shedding and variation response is similar to that detected in other protozoan parasites.
