(1) This ability may be associated with virulence, because an attenuated strain of L. pneumophila fails to multiply within this protozoan, whereas a virulent strain increases 10,000-fold in number when coincubated with T. pyriformis.
(2) Upon incubation with fluoresceinylated neoglycoproteins, isolated macronuclei from the ciliated protozoan Euplotes eurystomus display different labelling patterns depending on the nature of the sugar bound to the neoglycoproteins.
(3) It is suggested that this early immune maturity may play a role in the hardiness of WAD goats and in their relative resistance to helminth and protozoan infection as compared with local sheep.
(4) We compared the molecular nature of the rat brain opiate receptor with that of the invertebrate leech, Haemopis marmorata, and the protozoan, Tetrahymena, in order to examine the issue of apparent receptor heterogeneity with respect to biochemical structure.
(5) The protozoan parasite Trypanosoma cruzi is able to replicate in the cytoplasm of primary resident macrophages, but is killed by activated macrophages.
(6) Axenic H. vermiformis strain CDC-19 has been deposited with the American Type Culture Collection (ATCC 50237) and should prove useful in the study of protozoan-bacterial interaction.
(7) No cross reactions were observed in sera immune to other protozoan, helmintic and bacterial infections, although some cross reactivity was seen in P. falciparum immune sera.
(8) Alveolar macrophages from the 3 groups of subjects had similar limited microbicidal ability for the obligate intracellular protozoan, Toxoplasma gondii, and similar numbers of elastase receptors and affinity for elastase.
(9) DNA-dependent RNA polymerase from blood forms and culture forms of the parasitic protozoan Trypanosoma brucei was resolved into multiple peaks of activity by DEAE-Sephadex chromatography.
(10) A list is provided of the naturally or experimentally Aedes aegypti transmitted arboviruses (103), protozoans (5) and filaria (20).
(11) A 50% inhibition of the biosynthesis of dihydrosterculate is observed in the presence of 4 microM 10-thiastearate in the protozoan growth medium, but little effect is seen on the distribution of the other fatty acids.
(12) Protozoan species abundance was reduced to less than half by Zn but was unaffected by snails.
(13) Its presence in Giardia is consistent with the view that ARF emerged before the divergence of this protozoan from other eukaryotes (approximately 1.5 billion years ago), and that an ARF-like protein may have been the ancestor of several other classes of signal-transducing guanine nucleotide-binding proteins, including the alpha subunits of the heterotrimeric G proteins.
(14) We have found that the anaerobic protozoan parasite Giardia lamblia is incapable of de novo pyrimidine metabolism, as shown by its inability to incorporate orotate, bicarbonate, and aspartate into the pyrimidine nucleotide pool.
(15) Entamoeba coli was the most frequent protozoan (23.5%).
(16) In the macronucleus of the ciliated protozoan, Tetrahymena pyriformis GL, the genes coding for 17S and 25S rRNA exist as free, extrachromosomal molecules.
(17) Faecal samples were collected from 20 pigs in 4 age groups in randomly selected piggeries, and examined for the presence of eggs of helminth parasites and protozoan cysts.
(18) Nucleoside salvage pathways are vital to the parasitic protozoan Trypanosoma cruzi, and have become important targets in the development of new chemotherapeutic agents against this organism.
(19) It is now well established that pathogens such as viruses, fungi bacteria and protozoans can have profound effects on the dynamics of their invertebrate host populations.
(20) Leishmania donovani, the protozoan causing visceral leishmaniasis, is an obligate intracellular parasite of mammalian macrophages.
Protozoon
Definition:
(n.) One of the Protozoa.
(n.) A single zooid of a compound protozoan.
Example Sentences:
(1) S. muris and Theileria annulata belong to the phylum Apicomplexa, but the latter organism is a tick-borne protozoon in the subclass Piroplasmea and causes tropical theileriosis in cattle.
(2) Receptor-mediated binding of leukocyte chemotactic peptide, N-formylMet-Leu-Phe (fMLP), occurs in the ciliated protozoon Tetrahymena thermophila.
(3) Primary amoebic meningoencephalitis (ME) by Naegleria fowleri a free-living protozoon found in fresh, warm waters, is a well known fatal disease lasting less than one week.
(4) In the food web studies, predation of the protozoon on the two bacteria stabilized the competition between the latter and allowed their coexistence in the same habitat.
(5) A detailed morphological and tracer study of endocytosis via coated pits in Paramecium multimicronucleatum was undertaken to compare endocytic processes in a free-living protozoon with similar processes in higher organisms.
(6) Results obtained with in situ mitochondria of Trypanosoma cruzi showed that this protozoon had only two energy coupling sites, sites II and III that correspond to higher eukaryote mitochondria.
(7) Base composition, content of pyrimidine isopliths and methylation degree of mitochondrial DNA (mtDNA) and nuclear DNA (nDNA) from various vertebrates and protozoon Crithidia oncopelti have been studied.
(8) The multinucleated macroschizont stage of the protozoon Theileria annulata is an intracellular parasite of bovine leukocytes.
(9) The frequency of the protozoon in children under six months of age was higher in controls than in patients with acute diarrhoea.
(10) The protozoon Blastocystis hominis may cause episodes of diarrhoea with abdominal pain, tenesmus, fever and eosinophilia.
(11) The system was also divided into simpler parts, first by omitting the protozoon to obtain a competition system, and then by omitting one or the other of the bacteria to obtain two food chains.
(12) The action of the major protease from the parasitic protozoon Entamoeba histolytica, a cysteine protease of Mr 27,000-29,000, on some important proteins of the extracellular matrix has been studied.
(13) Proliferation of the protozoon was accompanied by the progressive disintegration of cell culture monolayers.
(14) Infection of the small intestine of humans with the parasitic protozoon Giardia lamblia may have an asymptomatic course, or it may produce acute or chronic diarrhoea.
(15) A remarkable fact was that the search for parasites in feces was repeatedly negative in two patients, the protozoon being identified in the intestinal biopsy samples.
(16) No protozoon other than Blastocystis hominis was present.
(17) Doxycyclin has a favourable effect not only on different gram-positive and gram-negative bacteria but also on a lot of other germs as mycoplasms, rickettsias, protozoons and large viruses.
(18) Cryptosporidium is an important intestinal protozoon in Malaysia and should be included in future field and laboratory studies and also in laboratory diagnosis for pathogens.
(19) An efficient method of growing the protozoon Tetrahymena to high cell densities in a 2-1 bioreactor is described.
(20) The flagellated protozoon Trichomonas vaginalis, parasite of the human urogenital tract, possesses a well developed microtubule system organized in highly differentiated structures.