| epidemic gastroenteritis virus | A RNA virus, about 27 nm in diameter, which has not been cultured in vitro; it is the cause of epidemic nonbacterial gastroenteritis; at least five antigenically distinct serotypes have been recognised, including the Norwalk agent. These viruses are probably classified with the Caliciviruses in the family Caliciviridae. Synonym: gastroenteritis virus type A. (05 Mar 2000) |
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| epidemic haemoglobinuria | The presence of haemoglobin, or of pigments derived from it, in the urine of young infants, attended with cyanosis, jaundice, and other conditions; may be due to secondary methemoglobinaemia; also called Winckel's disease. (05 Mar 2000) |
| epidemic haemorrhagic fever | A condition characterised by acute onset of headache, chills and high fever, sweating, thirst, photophobia, coryza, cough, myalgia, arthralgia, and abdominal pain with nausea and vomiting; this phase lasts from three to six days and is followed by capillary and renal interstitial haemorrhages, oedema, oliguria, azotemia, and shock; most varieties are caused by arboviruses (togaviruses, arenaviruses, flaviviruses, and bunyaviruses), and are rodent-borne. Synonym: haemorrhagic fever with renal syndrome, Songo fever. (05 Mar 2000) |
| epidemic hepatitis | A virus disease with a short incubation period (usually 15 to 50 days), caused by hepatitis A virus, a member of the family Picornaviridae, often transmitted by faecal-oral route; may be inapparent, mild, severe, or occasionally fatal and occurs sporadically or in epidemics, commonly in school-age children and young adults; necrosis of periportal liver cells with lymphocytic and plasma cell infiltration is characteristic and jaundice is a common symptom. Synonym: epidemic hepatitis, hepatitis A, infectious hepatitis, MS-1 hepatitis, short incubation hepatitis, virus A hepatitis. (05 Mar 2000) |
| epidemic hiccup | A persistent hiccup occurring as a complication of influenza. (05 Mar 2000) |
| epidemic hysteria | Spontaneous, en masse development of identical physical and/or emotional symptoms among a group of individuals, as seen in a classroom of schoolchildren, a socially contagious frenzy of irrational behaviour in a group of people as a reaction to an event. Synonym: epidemic hysteria. (05 Mar 2000) |
| epidemic keratoconjunctivitis | Follicular conjunctivitis followed by subepithelial corneal infiltrates; often caused by adenovirus type 8, less commonly by other types. Synonym: virus keratoconjunctivitis. (05 Mar 2000) |
| epidemic keratoconjunctivitis virus | An adenovirus (type 8) causing epidemic keratoconjunctivitis, especially among shipyard workers, and also associated with outbreaks of swimming pool conjunctivitis. (05 Mar 2000) |
| epidemic myalgia | An acute infectious disease usually occurring in epidemic form, characterised by paroxysms of pain, usually in the chest, and associated with strains of Enterovirus coxsackievirus type B. Synonym: benign dry pleurisy, Bornholm disease, Daae's disease, devil's grip, diaphragmatic pleurisy, epidemic benign dry pleurisy, epidemic diaphragmatic pleurisy, epidemic myalgia, epidemic myositis, myositis epidemica acuta, epidemic transient diaphragmatic spasm, Sylvest's disease. (05 Mar 2000) |
| epidemic myalgia virus | A virus of Enterovirus coxsackievirus type B, in the family Picornaviridae, that causes epidemic pleurodynia. Synonym: Bornholm disease virus, epidemic myalgia virus. (05 Mar 2000) |
| epidemic myalgic encephalomyelitis | An epidemic disease characterised by stiffness of the neck and back, headache, diarrhoea, fever, and localised muscular weakness; restricted almost exclusively to adults, affecting women more than men; probably viral in origin. Synonym: Akureyri disease, benign myalgic encephalomyelitis, epidemic myalgic encephalomyelitis, Iceland disease. (05 Mar 2000) |
| epidemic myalgic encephalomyelopathy | A disease superficially resembling poliomyelitis, characterised by diffuse involvement of the nervous system associated with myalgia. (05 Mar 2000) |
| epidemic myositis | An acute infectious disease usually occurring in epidemic form, characterised by paroxysms of pain, usually in the chest, and associated with strains of Enterovirus coxsackievirus type B. Synonym: benign dry pleurisy, Bornholm disease, Daae's disease, devil's grip, diaphragmatic pleurisy, epidemic benign dry pleurisy, epidemic diaphragmatic pleurisy, epidemic myalgia, epidemic myositis, myositis epidemica acuta, epidemic transient diaphragmatic spasm, Sylvest's disease. (05 Mar 2000) |
| epidemic nausea | Virus caused by Norwalk virus, a 27 nm RNA virus in the family Caliciviridae frequently occurring in a group of people (e.g., in a school or small community) suddenly and without prodromal illness or malaise, is intense while it lasts, but ceases abruptly after a few hours or a day or so; symptoms are headache, abdominal pain, giddiness, and diarrhoea in most of the cases, and extreme prostration in about 75%. Synonym: epidemic nausea. (05 Mar 2000) |
| epidemic neuromyasthenia | An epidemic disease characterised by stiffness of the neck and back, headache, diarrhoea, fever, and localised muscular weakness; restricted almost exclusively to adults, affecting women more than men; probably viral in origin. Synonym: Akureyri disease, benign myalgic encephalomyelitis, epidemic myalgic encephalomyelitis, Iceland disease. (05 Mar 2000) |