Erythr: From 1 Different Sources
(erythro-) combining form denoting 1. redness. Example: erythuria (excretion of red urine). 2. erythrocytes.
A super?cial mild infection of the skin caused by CORYNEBACTERIA. It produces pink or slightly brown ?aky areas of skin usually on the upper inner thighs or axillae. Toe clefts may be affected with thickened, white, macerated skin. The affected areas ?uoresce coral pink under ultraviolet light. CLOTRIMAZOLE or KETOCONAZOLE cream clears the rash rapidly. Very extensive erythrasma responds to oral ERYTHROMYCIN given for seven days.... erythrasma
One of the MACROLIDES, it has an antibacterial spectrum similar, but not identical, to that of penicillin. The drug is a valuable alternative for patients who are allergic to penicillin. Erythromycin is used for respiratory infections, including spread within a family of WHOOPINGCOUGH, and also CHLAMYDIA, LEGIONNAIRE’S DISEASE, SYPHILIS and enteritis caused by CAMPYLOBACTER. It is also used with neomycin when preparing for bowel surgery. Though often active against penicillin-resistant staphylococci, these bacteria are now sometimes resistant to erythromycin. The drug may be given orally, intravenously or topically (for acne).... erythromycin
See ESR.... erythrocyte sedimentation rate
The protein, produced mainly in the kidney, that is the major stimulus for the production of ERYTHROCYTES, or red blood corpuscles. It is used when treating ANAEMIA dure to end-stage kidney failure and in premature newborns with anaemia. (See also BLOOD.)... erythropoietin
Another name for a red blood cell (see blood cells).... erythrocyte
See HAEMOLYTIC DISEASE OF THE NEWBORN.... erythroblastosis fetalis
A series of nucleated cells in the bone marrow that go through various stages of development until they form ERYTHROCYTES. They may appear in the blood in certain diseases.... erythroblasts
The process by which ERYTHROCYTES or red blood cells are produced. The initiating cell is the haemopoietic stem cell from which an identi?able proerythroblast develops. This goes through several stages as a normoblast before losing its nucleus to become an erythrocyte. This process takes place in the blood-forming bone-marrow tissue.... erythropoeisis
See: POLYCYTHAEMIA VERA. ... erythraemia
n. any of a series of nucleated cells (see normoblast; proerythroblast) that pass through a succession of stages of maturation to form red blood cells (*erythrocytes). Erythroblasts are normally present in the blood-forming tissue of the bone marrow, but they may appear in the circulation in a variety of diseases (see erythroblastosis). See also erythropoiesis.... erythroblast
The biconcave red blood cells that carry oxygen from the lungs to the tissues, and return carbon dioxide (see also RESPIRATION). They have an excess of membrane, some of which may be lost in various disorders, as a result of which they become progressively more spherical and rigid. Erythrocytes, which have no nuclei, are formed during ERYTHROPOEISIS from ERYTHROBLASTS in the BONE MARROW, and each mm3 of blood contains 5 million of them. They are by far the largest constituent among the blood cells and they contain large amounts of the oxygen-carrier HAEMOGLOBIN. They have a life of about 120 days after which they are absorbed by macrophages (see MACROPHAGE), the blood’s scavenging cells. Most components of the erythrocytes, including the red pigment haemoglobin, are re-used, though some of the pigment is broken down to the waste product BILIRUBIN.... erythrocytes
n. the presence in the blood of the nucleated precursors of the red blood cells (*erythroblasts). This may occur when there is an increase in the rate of red cell production, as in haemorrhagic or haemolytic *anaemia, or in infiltrations of the bone marrow by tumours, etc.... erythroblastosis
a severe but rare haemolytic *anaemia affecting newborn infants due to destruction of the infant’s red blood cells by factors present in the mother’s serum. It is usually caused by incompatibility of the rhesus blood groups between mother and infant (see rhesus factor).... erythroblastosis foetalis
n. mottled purplish discoloration on the legs and thighs, usually of adolescent girls or obese boys before puberty. The disorder sometimes occurs in older women and is worse in cold weather. Weight loss is the best treatment because it reduces the insulating effect of a thick layer of fat.... erythrocyanosis
adj. describing those stages in the life cycle of the malarial parasite (see Plasmodium) that develop inside the red blood cells (see trophozoite). Compare exoerythrocytic.... erythrocytic
n. see pink disease.... erythroedema
n. a former name for *erythropoiesis.... erythrogenesis
n. circulating mature red blood cells and that part of the blood-forming system of the body that is directed towards the production of red blood cells. The erythron is not a single organ but is dispersed throughout the blood-forming tissue of the *bone marrow. See also erythropoiesis.... erythron
n. a reduction in the number of red blood cells (*erythrocytes) in the blood. This usually, but not invariably, occurs in *anaemia.... erythropenia
n. an abnormal red patch of skin that occurs particularly in the mouth or on the genitalia and is precancerous. Erythroplasia of Queyrat is a nonkeratinizing *carcinoma in situ affecting the glans of the penis or the inner surface of the prepuce. It is ten times more likely to progress to invasive squamous cell carcinoma than is *Bowen’s disease of the penis. Compare leukoplakia.... erythroplasia
n. the process of red blood cell (*erythrocyte) production, which normally occurs in the blood-forming tissue of the *bone marrow. The ultimate precursor of the red cell is the *haemopoietic stem cell, but the earliest precursor that can be identified microscopically is the *proerythroblast. This divides and passes through a series of stages of maturation termed respectively early, intermediate, and late *normoblasts, the latter finally losing its nucleus to become a mature red cell. See also haemopoiesis.... erythropoiesis
n. red vision: a symptom sometimes experienced after removal of a cataract and also in snow blindness.... erythropsia
n. see parvovirus.... erythrovirus
(hand–foot syndrome) a skin reaction marked by redness, numbness, and desquamation of the palms of the hands and soles of the feet. It can be caused by many chemotherapy drugs, particularly fluorouracil and capecitabine, and tyrosine kinase inhibitors. Treatment requires cessation of the drug.... palmoplantar erythrodysaesthesia
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