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.
Immunodeficiency (or immune deficiency) is a state in which the immune system 's ability to fight infectious disease is compromised or entirely absent.mmunodeficiency (or immune deficiency) is a state in which the immune system 's ability to fight infectious disease is compromised or entirely absent.