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Atypia (from Greek, a + typos, without type; a condition of being irregular or nonstandard) [1] is a histopathologic term for a structural abnormality in a cell, i.e. it is used to describe atypical cells. Atypia can be caused by infection or irritation. If, for example it were diagnosed in a Pap smear in the uterus it is more likely to be ...
In literature the term atypical pneumonia is current, sometimes contrasted with viral pneumonia (see above) and sometimes, though incorrectly, with bacterial pneumonia. Many of the organisms causative of atypical pneumonia are unusual types of bacteria (Mycoplasma is a type of bacteria without a cell wall and Chlamydias are intracellular ...
Atypical bacteria are bacteria that do not get colored by gram-staining but rather remain colorless: they are neither Gram-positive nor Gram-negative. These include the Chlamydiaceae , Legionella and the Mycoplasmataceae (including mycoplasma and ureaplasma ); the Spirochetes and Rickettsiaceae are also often considered atypical.
Nontuberculous mycobacteria (NTM), also known as environmental mycobacteria, atypical mycobacteria [1] and mycobacteria other than tuberculosis (MOTT), are mycobacteria which do not cause tuberculosis or leprosy/Hansen's disease. NTM can cause pulmonary diseases that resemble tuberculosis. [2]
Find out what typical and atypical antipsychotics are, what they are used for, how they work, and their potential risks and benefits.
The atypical lymphocytes have been best studied from blood of patients with infectious mononucleosis. Early studies suspect that atypical lymphocytes could have both T or B cells features; now it is more suggested that reactive lymphocytes are activated T-lymphocytes produced in response to infected B-lymphocytes.
It's flu season right now, and the U.S. is in the midst of a wave that's straining hospitals.But not all influenza is the same. There are some notable differences between flu A and flu B strains.
Nuclear atypia refers to abnormal appearance of cell nuclei. It is a term used in cytopathology and histopathology. Atypical nuclei are often pleomorphic. Nuclear atypia can be seen in reactive changes, pre-neoplastic changes and malignancy. Severe nuclear atypia is, in most cases, considered an indicator of malignancy.