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.
Examples of deficiency diseases along with the respective nutrients whose lack results in the conditions include: beriberi (vitamin B1), kwashiorkor (protein), goiter (iodine), anemia (iron), marasmus (protein), pellagra (vitamin B3), scurvy (vitamin C), rickets (vitamin D) and osteoporosis (vitamin D and calcium).