Capsules increase virulence of some organisms because they pre â¦ vent desiccation, are able to stick to surfaces and provide a mechanism for attachment to tissue such as respiratory epithelial tissue in humans. Capsules are also slippery and often evade a human's immune system by avoiding phagocytosis from certain leukocytes.
Definition of DEFICIENCY DISEASE. : a disease (as scurvy) caused by a lack of essential dietary elements and especially a vitamin or mineral.
Video: Immune Deficiency Diseases: Definitions & Types. This lesson will teach you about the immune system, what immune deficiency means, why that's dangerous, and about the important causes of such a problem, including HIV/AIDS, SCID, CVID, and more. Immune Deficiency Diseases: Definitions & Types. An error occurred trying to load this video.