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It should be noted, however, that protozoan and myxozoan parasites were not recorded in most studies.
Since its description, the lifecycle of this protozoan parasite has eluded discovery.
The fish were infected with 18 helminth species, four myxozoans and one protozoan.
Because of the ubiquity of cysteine proteases in both protozoan and helminth parasites, they represent attractive targets for anti-parasitic drug development.
For oocysts, the numbers of sporocysts/sporozoites were used for identification; those that had not undergone sporulation were considered to be protozoan oocysts.
Chapter 2 (8 pages) covers the parasitic protozoans.
Moreover, in certain protozoans, meiosis takes place without a previous replication of homologues, which makes chiasmatic recombination impossible.
This antigen shedding and variation response is similar to that detected in other protozoan parasites.
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 is likely to be the case whether the infective agent is microbial or protozoan.
One way for bacteria to resist protozoan grazing is the production of secondary metabolites.
Populations consist of a few major clones with some closely related ones - a structure found for several parasitic protozoans and bacteria.
These are possibilities that have long been considered for protozoan infections.
Diversity of both helminths and protozoans was higher in the squares.
This characteristic has also been found in other protozoan parasites.
