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.
Definition of 'vitamin deficiency'. Word Frequency. vitamin deficiency (ËvÉªtÉmÉªn dÉªËfÉªÊÉnsÉª) noun. a lack of a vitamin or vitamins needed for good health. The heart can also be affected by the vitamin deficiencies caused by a neglected diet. Example sentences containing 'vitamin deficiency'.