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.
n. A disease, such as rickets or scurvy, that is caused by a dietary deficiency of specific nutrients, especially a vitamin or mineral. The disease may stem from insufficient intake, digestion, absorption, or utilization of a nutrient.eficiency disease. n. 1. (Pathology) med any condition, such as pellagra, beriberi, or scurvy, produced by a lack of vitamins or other essential substances.