0 any of various types of very small animals with one cell -- 原生动物；单细胞生物
Amoebas are protozoans. 阿米巴虫是原生动物。
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.
