apoptosis

Yersinia pestis: Introduction and morphology

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yersinia pestis

Introduction Formerly known as Pasteurella pestis. Falls in family enterobacteriaceae. Discovered in Honkong in 1894 AD by Yersin and Kitasato. Important medical species are Y.pestis, Y. pseudotuberculosis and Y. enterocolitica. Y. pestis responsible for causing plague whereas Y. pseudotuberculosis is a primary pathogen of rodents. Similarly, Y. enterocolitica causes enteric and systemic diseases. These diseases … Read more

Natural killer cells (NKC)

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Natural killer cells (NKC)

Introduction of Natural Killer Cells Natural killer cells are class of lymphocytes that respond to intracellular microbes by killing the infected cells and by producing macrophage activating cytokines. They comprise about 10% of the lymphocytes in the blood and peripheral lymphoid organs. These cells contain abundant cytoplasmic granules and express characteristic markers but they do … Read more