| asbestos wart | A granulomatous or hyperkeratotic lesion of the skin at the site of deposit of asbestos particles. Synonym: asbestos wart. (05 Mar 2000) |
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| asbestos, amosite | <chemical> Asbestos, grunerite. A monoclinic amphibole form of asbestos having long fibres and a high iron content. It is used in insulation. Pharmacological action: carcinogens. Chemical name: Asbestos, grunerite (12 Dec 1998) |
| asbestos, amphibole | <chemical> A class of asbestos that includes silicates of magnesium, iron, calcium, and sodium. The fibres are generally brittle and cannot be spun, but are more resistant to chemicals and heat than asbestos, serpentine. Pharmacological action: carcinogens. (12 Dec 1998) |
| asbestos, crocidolite | <chemical> Crocidolite. A lavender, acid-resistant asbestos. Pharmacological action: carcinogens. Chemical name: Crocidolite (12 Dec 1998) |
| asbestos, serpentine | <chemical> A type of asbestos that occurs in nature as the dihydrate of magnesium silicate. It exists in two forms: antigorite, a plated variety, and chrysotile, a fibrous variety. The latter makes up 95% of all asbestos products. Pharmacological action: carcinogens. (12 Dec 1998) |
| asbestosis | <chest medicine> Fibrosis of the lung as a result of the chronic inhalation of asbestos fibres. The needle like asbestos fibres are phagocytosed by alveolar macrophages but burst the phagosome (phagocytic vesicle) and kill the macrophage and the cycle is repeated. Mesothelioma, a rare tumour of the mesothelial lining of the pleura, is associated with intense chronic exposure to asbestos dust, particularly that of crocidolite asbestos. (18 Nov 1997) |
| asbolin | <chemistry> A peculiar acrid and bitter oil, obtained from wood soot. Origin: Gr. Soot. Source: Websters Dictionary (01 Mar 1998) |
| ascamycin aminopeptidase | <enzyme> From xanthomonas citri; removes alanine from ascamycin to form dealanylascamycin Registry number: EC 3.4.11.- Synonym: ascamycin-hydrolyzing aminopeptidase (26 Jun 1999) |
| ascariasis | <radiology> Most common parasitic infection in the world, endemic along Gulf Coast, Ozark Mountains, Nigeria, Southeast Asia, organism: Ascaris lumbricoides, age: children (1-10 y.o.), cycle: soil to duodenum to venules/lymphatics to lung to brochus to mouth to jejunum, location: jejunum greater than ileum (99%), duodenum, stomach, common bile duct, pancreatic duct, symptoms: colic, eosinophilia, appendicitis, haematemesis, pneumonitis, jaundice X-ray: 15-35 cm long filling defects, whirled appearance (bolus of worms) complications: intestinal obstruction/perforation, intermittant biliary obstruction, liver abscess (rare), granulomatous stricture of extrahepatic bile ducts (rare) (12 Dec 1998) |
| ascariasis infection | <microbiology> Infection by the nematode Ascaris lumbricoides and is characterised by an early pulmonary phase related to larval migration and a later, prolonged intestinal phase. Adult worms are 15-40 cm in length and maintain themselves in the lumen of the small intestine. Infection occurs after ingesting eggs contained in contaminated food or more commonly, by transmission to the mouth by the hands after contact with contaminated soil. Treatment is with mebendazole or pyrantel pamoate. (27 Sep 1997) |
| ascaricide | 1. Causing the death of ascarid nematodes. 2. An agent having such properties. Origin: ascarid + L. Caedo, to kill (05 Mar 2000) |
| ascarid | Origin: NL. Ascaris, fr. Gr. <zoology> A parasitic nematoid worm, espec. The roundworm, Ascaris lumbricoides, often occurring in the human intestine and allied species found in domestic animals; also commonly applied to the pinworm (Oxyuris), often troublesome to children and aged persons. Source: Websters Dictionary (01 Mar 1998) |
| Ascaridae | Former spelling for Ascarididae. (05 Mar 2000) |
| Ascaridata | An order of nematodes of the subclass secernentea. Its organisms possess two or three pairs of dorsolateral caudal papillae. (12 Dec 1998) |
| ascaridia | A genus of nematode worms. A. Galli and a. Lineata are important intestinal parasites of domestic fowl. (12 Dec 1998) |