| 词汇 | protozoan |
| 释义 | protozoan noun[ C ] (alsoprotozoonpluralprotozoauk /ˌprəʊ.təˈzəʊ.ə/ us /ˌproʊ.t̬əˈzoʊ.ə/)uk /ˌprəʊ.təˈzəʊ.ən/ us /ˌproʊ.t̬əˈzoʊ.ən/ biology specialized 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。 Protozoans reproduce by splitting into two. The protozoan that causes malaria can penetrate the gut wall and ultimately migrate to the mosquito's salivary gland, where it is injected into the mosquito's next victim. Isosporiasis is caused by Isospora belli, a protozoan belonging to the family Apicomplexa. These single-celled protozoa get shuttled among people and animals by several species of insects. Plants & animals - general words animal kingdom anti-parasitic autotroph biota biped epiphytically esculent family fauna flora mammalian migrant natively non-mammalian non-placental ruminant scavenger secondary consumer songster terrestrially protozoan adjective uk /ˌprəʊ.təˈzəʊ.ən/ us /ˌproʊ.t̬əˈzoʊ.ən/ biology specialized used to refer to any of various types of very small animals with one cell; involving or relating to this type: Toxoplasmosis is an infection caused by a protozoan parasite found in undercooked meat. When the temperature reached 32-degrees-F all protozoan activity ceased. Cryptosporidium are protozoan parasites. They studied 30 widely differing types of marine bacteria that were all readily eaten by protozoan predators. Chagas' disease is a serious protozoan infection. Plants & animals - general words animal kingdom anti-parasitic autotroph biota biped epiphytically esculent family fauna flora mammalian migrant natively non-mammalian non-placental ruminant scavenger secondary consumer songster terrestrially protozoan | American Dictionaryprotozoan noun[ C ] us/ˌproʊ·t̬əˈzoʊ·ən/pluralprotozoans or protozoaus/ˌproʊ·t̬əˈzoʊ·ə/ biology a very small organism with only one cell Examples of protozoanprotozoan 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. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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