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In medicine, a deficiency is a lack or shortage of a functional entity, by less than normal or necessary supply or function. A person can have chromosomal deficiencies, mental deficiencies, nutritional deficiencies, complement deficiencies, or enzyme deficiencies.
Vitamin deficiency is the condition of a long-term lack of a vitamin. When caused by not enough vitamin intake it is classified as a primary deficiency, whereas when due to an underlying disorder such as malabsorption it is called a secondary deficiency. An underlying disorder can have 2 main causes:
Deficiency (medicine), including various types of malnutrition, as well as genetic diseases caused by deficiencies of endogenously produced proteins; A deficiency in construction, an item, or condition that is considered sub-standard, or below minimum expectations; Genetic deletion, in genetics, also called a deficiency
Granulocyte deficiency, including decreased numbers of granulocytes (called as granulocytopenia or, if absent, agranulocytosis) such as of neutrophil granulocytes (termed neutropenia). Granulocyte deficiencies also include decreased function of individual granulocytes, such as in chronic granulomatous disease.
There are four main types of disease: infectious diseases, deficiency diseases, hereditary diseases (including both genetic and non-genetic hereditary diseases), and physiological diseases. Diseases can also be classified in other ways, such as communicable versus non-communicable diseases.
[11] [12] Specifically, it is a deficiency, excess, or imbalance of energy, protein and other nutrients which adversely affects the body's tissues and form. [13] Malnutrition is a category of diseases that includes undernutrition and overnutrition. [14] Undernutrition is a lack of nutrients, which can result in stunted growth, wasting, and ...
Scurvy is a deficiency disease (state of malnutrition) resulting from a lack of vitamin C (ascorbic acid). [1] Early symptoms of deficiency include weakness, fatigue, and sore arms and legs. [1] [2] Without treatment, decreased red blood cells, gum disease, changes to hair, and bleeding from the skin may occur.
An autoimmune disease is a condition arising from an abnormal immune response to a normal body part. [5] There are at least 80 types of autoimmune diseases. [5] Nearly any body part can be involved. Common symptoms include low-grade fever and feeling tired. [5] Often symptoms come and go. [5]