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Updated: Aug 18, 2026
07:45
Soil Sampling and Isolation of Entomopathogenic Nematodes (Steinernematidae, Heterorhabditidae)
Published on: July 11, 2014
Abstract:
A 21 year old man complained of pain and burning sensation on the helices of both ears, precipitated by cold weather. Examination showed tender erythematous nodules. Biopsies of both ears showed the characteristic vascular and inflammatory changes of pernio. In addition, in the left ear, there were foci of necrotic collagen surrounded by palisaded histiocytes. The presence of necrobiosis in pernio has not been reported previously. In this case, necrobiosis would appear to have a vascular basis.
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Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
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Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become anucleated and die, but their...
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become anucleated and die, but their...
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