BioScience Dictionary

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Found Protozoa 40 times.

Displaying results 1 to 10.

1. Acetarsone
An arsenic-containing compound administered to treat infections of the parasite protozoa n Entameba histolytica in the intestine or genitourinary tract.

2. Activated sludge process
A method of treating sewage and wastewater through microbial oxidation. Sewage previously treated in settling tanks is aerated to encourage the growth of nonpathogenic aerobic microorganisms ( bacteria , yeast s, molds and protozoans) which break the organic matter down into carbon dioxide, water, and simple salts. After this activated sludge is produced, the wastewater undergoes further processing through anaerobic digestion, filtering, and chlorination.

3. African sleeping sickness
A disease affecting humans and other mammals in central Africa that is caused by the parasitic protozoa ns Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense and is transmitted by the tsetse fly. Symptoms include fever, chills, headache, vomiting, pain in the extremities, lymph gland enlargement, anemia, depression, fatigue, coma, and eventually death if left untreated. The trypanosome is able to evade the host's immune system by frequently changing the protein s on its outer surface, by which the immune system identifies intruders.

4. Amebiasis (amebic dysentery)
Amebiasis is an infection with amoebas (a type of protozoan), particularly Entamoeba histolytica. The disease is contracted by eating food or drinking water that has been infected with encysted forms of the amoebas. The symptoms include diarrhea, weakness, and sometimes jaundice. During the course of the disease, sores and abscesses form on the mucous membrane of the large intestine (sometimes causing perforations), and the abscesses may be carried to the liver via the portal vein. Patients are usually treated with drugs called metronidazole (Flagyl) and chloroquinine; they may need to be medicated for up to three months to clear the infection.

5. Aufwuchs
Complex assemblage of plants and animals living on the surface of a submerged mineral or organic substrate. It includes diatoms, blue-green algae , protozoa , rotifers and nematodes.

6. Babesiasis (babesiosis, piroplasmosis)
A parasitic disease affecting mammals which is caused by protozoa from the genus Babesia of the order Piroplasmida and is transmitted by ticks. The Babesia protozoa feed on the blood of mammals. Symptoms include high fever, anemia , and red urine (hemoglobinuria).

7. Cyclospora cayetanensis
Cyclospora cayetanensis is an acid-fast , coccidian-like, parasitic protozoan with the size of 8-10 micrometer in diameter. Cyclospora cayetanesis was recently recognized as a new (intestinal) protozoan pathogen of human (1993, species name was proposed in 1994) and was identified as the cause of the prolonged diarrhea of travelers as well as immunocompetent and immunocompromised patients.

8. Dumposome
A protein , possibly even a new organelle , found in the one-celled ciliated protozoan "tetrahymena," an organism which contains two nuclei (unlike most other organisms which only contain one) - the macronucleus and the micronucleus . During sexual reproduction , in which two tetrahymena fuse and produce four offspring, this protein destroys the two parental macronuclei (whose genetic material were not used during the sexual reproduction) and removes the gene s related to sexual reproduction from all offspring macronuclei.

9. Endomixis
* Self-fertilization; the union of an egg and a sperm which are both from the same individual. * In certain ciliated protozoan s, a process of nuclear division and reorganization.

10. Euglena
Euglena is a genus of flagellate freshwater protozoan s. It contains chlorophyll and is therefore photosynthetic, but it can also be mobile and gather its own food when sunlight is absent. Because it has the characteristics of both plants and animals, it is thought to be related to/similar to the ancestral organism which gave rise to both plants and animals.

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