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50 TERMS PART1
PARASITOLOGY PART1
| Term | Definition |
|---|---|
| Marita | Stage of sexually mature worm in the life cycle of flukes. |
| Metacercaria | Invasive stage for a principal host in the life cycle of flukes. |
| Miracidium | The 1st larval stage in the life cycle of flukes. |
| Redia | Larval stage of flukes in which parasitize the 1st intermediate host. |
| Sporocyst | Larval stage of flukes that develops in the organism of the 1st intermediate host from a miracidium. |
| Cercaria | Mobile larva of the fluke that is leaves the mollusk’s organism and gets to water. |
| Sporogony | Stage of life cycle of malaria parasite when its gamates develop in a mosquito. |
| Gamont (gametocyte) | Cell-precursor of a malaria parasite's gamete. |
| Schizontic malaria | Malaria occuring when the invasive stage is an erythrocyte schizont. |
| Merozoite | Vegetative stage in the life cycle of sporozoans. |
| Merulation | Coming out of mature merozoites from erythrocytes into the blood plasma in life cycle of Plasmodium sp. |
| Ookinete | Movable zygote of malaria parasite |
| Oocyst | Life stage of malaria parasite situated on the external surface of the mosquito's stomach and it containing sporozoites. |
| Pseudocyst | Cyst in tissues that is formed as a result of accumulation of trophopzoits of the toxoplasma in a cell. |
| Schizont | Life stage of sporozoans that is capable of schizogony. |
| True cyst | Life stage of sporozoans that is capable of schizogony. |
| Scolex | The head of a tapeworm either in the larva or adult stage. |
| Proglottid | One of the segments making up the body of a tapeworm. Also termed: proglottis. |
| Neck | The connecting tissues between the scolex and strobila of a tapeworm. This part is unsegmented. |
| Kingdom | Highest rank in the classification of living organisms, which encompasses phyla (for animals) and divisions (for plants). |
| Class | In biological classification, one of the groups into which a phylum is divided, and which is itself divided into orders; e.g. Mammalia (mammals), Aves (birds). |
| Phylum | One of the groups into which the animal kingdom is divided. The members of the group, although often quite different in form and structure, share certain common features. |
| Genus | In biological classification, one of the groups into which a family is divided, and which is itself divided into species. |
| Species (sp) | Smallest group commonly used in biological classification and into which a genus is divided. Species are sometimes further divided into subspecies (races). |
| Coracidium | The first larval stage of a pseudophyllidean cestode. This motile stage consists of a ciliated embryophore containing the oncosphere. |
| Procercoid | The second larval stage in the life cycle of a pseudophyllidean cestode,e.g. Diphyllobothrium latum. |
| Plerocercoid | The third stage larva of pseudophyllidea which has a solid body.,e.g. Diphyllobothrium latum. |
| Axostyle | A stiff rod of protoplasm acting as an internal skeletal support in certain protozoa such as Trichomonas, which extends from the kinetosome to the posterior end of the organism. |
| Metathorax | A term used in relation to arthropods. Last or third thoracic segment. |
| Mesothorax | The middle of the three segments in the thorax of an insect, and bears the second pair of legs. |
| Binary fission | Method of reproduction employed by many single-celled organisms such as protozoa, in which the so-called mother cell divides in half (by mitosis), forming two identical, but independent, daughter cells. It is a type of asexual reproduction. |
| Amitosis (direct cell division) | Cell division by simple cleavage of the nucleus and division of the cytoplasm without spidle formation or appearance of chromosomes. |
| Hypodermis | A term used in relation to nematodes. Epidermis. A layer between the cuticle and the somatic musculature. |
| Epidermis | Layer of cells at the surface of a plant or animal. In plants and some invertebrates, it forms a single protective layer, often overlaid by a cuticle which is impermeable to water. |
| Cuticle | The external non-cellular hyaline layer covering the nematodes. |
| Suckers | A term used in relation to trematodes. Adhesive organs. There are generally two suckers, oral and ventral. |
| Adhesive tape (methods) | A strip of fabric or other material evenly coated on one side with a pressuresensitive adhesive material which may be used as a method of collecting ectoparasites. |
| Anoscopy (methods) | The examination of the anal canal with an anoscope. |
| Anosigmoidoscopy (methods) | The endoscopic examination of the anus and distal colon. |
| Baermann technique (methods) | A laboratory method for separating parasite larvae from faeces, soil or herbage for counting or identification. |
| Impression smear (methods) | A smear made by pressing a laboratory glass slide against tissue. |
| McMaster technique (methods) | A rapid, simple, quantitative technique for counting parasite eggs in ruminant faeces (USA: feces), based on flotation on concentrated salt solution (specific gravity of l.l to l.3) in a counting chamber. |
| Scraping (methods) | A scraping of the superficial elements of the skin for laboratory examination for parasitic elements. |
| Serological test (methods) | A test involving examination of blood serum usually for antibody. |
| Sheather’s flotation method (methods) | A method for examining faeces for the presence of worm eggs or larvae by mixing with a saturated solution of sodium chloride or sugar and collecting a sample from the top of a column for microscopic examination. |
| Hexacanth embryo | The infective stage (larvae, oncosphere) in a cestode egg after fertilization takes place. |
| Oncosphere | The larva of the tapeworm contained within the external embryonic envelope within the egg and armed with six hooks. Also termed: onchosphere. |
| Operculum | A lid-like structure covering certain cestode and most trematode eggs. |
| Cyclops | A genus of minute crustaceans with terrestrial life cycles, some species of which act as hosts of Diphyllobothrium and Dracunculus spp. Also termed: water flea. |
| Prothorax | This is the foremost of the three segments in the thorax of an insect, and bears the first pair of legs. |
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Zelotes13071976
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