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The cyst wall of some ciliated protists is composed of four layers, ectocyst, mesocyst, endocyst, and the granular layer. The ectocyst is the outer layer and contains a plug-like structure through which the vegetative cell reemerges during excystation. Interior to the ectocyst, the thick mesocyst is compact yet stratified in density.
Entamoeba coli is a non-pathogenic species of Entamoeba that frequently exists as a commensal parasite in the human gastrointestinal tract. E. coli (not to be confused with the bacterium Escherichia coli) is important in medicine because it can be confused during microscopic examination of stained stool specimens with the pathogenic Entamoeba histolytica. [1]
Phoronts go through metamorphosis to prepare for excystation. Metamorphosis changes the body shape, organization, and physiology of the phoront to allow for rapid ingestion and storage of large amounts of food. Histotrophic phoronts metamorphose within a few hours of encysting on their hosts.
Parasitology is the study of parasites, their hosts, and the relationship between them. As a biological discipline , the scope of parasitology is not determined by the organism or environment in question but by their way of life.
Parasite load is a measure of the number and virulence of the parasites that a host organism harbours. Quantitative parasitology deals with measures to quantify parasite loads in samples of hosts and to make statistical comparisons of parasitism across host samples.
Two apicomplexans, Toxoplasma gondii, within their host cell.Transmission electron microscopy. Obligate intracellular parasites cannot reproduce outside their host cell, meaning that the parasite's reproduction is entirely reliant on intracellular resources.
Parasitology is the study of parasites in host organisms, including humans (medical parasitology). Subcategories. This category has the following 7 subcategories, out ...
A laboratory specimen is sometimes a biological specimen of a medical patient's tissue, fluids, or other samples used for laboratory analysis to assist in differential diagnosis or staging of a disease process. These specimens are often the most reliable method of diagnosis, depending on the ailment.