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host defense |
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host defense The protection an organism is afforded against infections Types 1. Nonimmunologic–eg, mucocutaneous or integumental barriers, cilia, microvilli; mechanical–eg, urinary outflow, vascular perfusion of tissues;
native flora, which 'outcompete' pathogens; 2. Immunologic–eg, chemotaxis, phagocytosis, immunoglobulins, complement, T cell defense How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The innate immune system is the dominant system of host defense in most organisms. Neutrophils are both effectors of host defense and central arbitrators of lung injury (6). Treatment of diphtheria with antitoxin, for example, neutralizes the toxin formed by the microorganisms, and host defense mechanisms then rid the body of the causative microorganisms. |
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