What is a pleomorphic microorganism?
pleomorphism, the existence of irregular and variant forms in the same species or strain of microorganisms, a condition analogous to polymorphism in higher organisms.
What does pleomorphic cells mean?
Listen to pronunciation. (PLEE-oh-MOR-fik) Occurring in various distinct forms. In terms of cells, having variation in the size and shape of cells or their nuclei.
What does nuclear Pleomorphism indicate?
Nuclear pleomorphism describes how different the. nucleus. Close. nucleus. The part of the cell that holds the chromosomes, which contain DNA (genetic information).
Which organism is highly pleomorphic?
The genera Corynebacterium and Coccobacillus have been designated as a pleomorphic genera, diphtheroid Bacilli have been classified as pleomorphic nosocomial bacteria.
What is a pleomorphic give an example?
Some of the bacteria belonging to Deinococcaceae family show pleomorphism. E.g. Deinococcus radiodurans is an extremophile and is the most radiation-resistant bacterium known. Legionella pneumophila is another example of pleomorphic bacteria. Helicobacter pylori also shows pleomorphism.
What is pleomorphism in pathology?
Pleomorphism is a term used in histology and cytopathology to describe variability in the size, shape and staining of cells and/or their nuclei. Several key determinants of cell and nuclear size, like ploidy and the regulation of cellular metabolism, are commonly disrupted in tumors.
What bacteria causes pleomorphism?
Many modern scientists regard pleomorphism as either a bacterium’s response to pressure exerted by environmental factors, such as bacteria that shed antigenic markers in the presence of antibiotics, or as an occurrence in which bacteria evolve successively more complicated forms.
What is cellular and nuclear Pleomorphism?
What are pleomorphic changes?
Nuclear pleomorphism In cancer, the mechanisms that control genes and chromosomes in the nucleus break down, and irregular nuclei and pleomorphic changes are signs of abnormal cell reproduction. Note: The cancer areas having cells with the greatest cellular abnormalities should be evaluated.
What is pleomorphic example?
A well accepted example of pleomorphism is Helicobacter pylori, which exists as both a helix-shaped form (classified as a curved rod) and a coccoid form.