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.
deficiency. a lack or shortage; a condition characterized by the presence of less than the normal or necessary supply or competence. antidiuretic hormone deficiency. see diabetes insipidus. clotting factor deficiency. see clotting. Hageman factor deficiency. see clotting.