| histophysiology | The microscopic study of tissues in relation to their functions. (05 Mar 2000) |
|---|---|
| histoplasma | A fungus found worldwide. In the USA, it is so common in the midwest that in parts of kentucky and tennessee nearly 90% of adults show evidence of exposure (with a positive histoplasma skin test). (12 Dec 1998) |
| Histoplasma capsulatum | A dimorphic fungus species of worldwide distribution that causes histoplasmosis in humans and other mammals; its ascomycetous state is Ajellomyces capsulatum. The organism's natural habitat is soil fertilised with bird and bat droppings, where it grows as a mold, fragments of which, following inhalation, produce the primary pulmonary infection; within the mammalian host tissues, inhaled mycelial fragments grow as uninuclear yeasts that reproduce by budding. This parasitic form may also be induced in the laboratory by culturing the mycelial phase at 37캜 on a blood-enriched medium; growth reverts to the mycelial form when the temperature is below 37캜. Histoplasma capsulatum var. Duboisii causes a clinically distinct disease, African histoplasmosis, in which large yeast cells with thicker walls are found in tissues, in contrast to the small yeast cells of Histoplasma capsulatum var. Farciminosum, which causes epizootic lymphangitis. Origin: histo-+ G. Plasma, something formed (05 Mar 2000) |
| histoplasmin | <protein> Filtrate of a mycelial culture of Histoplasma capsulatum, the causative agent of histoplasmosis. Histoplasmin is intradermally injected in a skin test for the disease. (18 Nov 1997) |
| histoplasmin-latex test | A passive agglutination test for histoplasmosis; latex particles, sensitised with antigen extracted from Histoplasma capsulatum, are used in a flocculation reaction with the patient's serum. (05 Mar 2000) |
| histoplasmoma | An infectious granuloma caused by Histoplasma capsulatum. (05 Mar 2000) |
| histoplasmosis | A fungal disease that is rarely a significant problem in those with a normal functioning immune system. This infection is more common in the southeastern, midatlantic and central states. The vast majority of infections are either asymptomatic or mild and the diagnosis can be difficult. Cough, fever, malaise and typical chest X-ray findings can occur. A serious disseminated form of the infection can occur in the immunocompromised individual (AIDS) that carries a 90% fatality rate. (27 Sep 1997) |
| historadiography | Radiography of tissue, specifically microscopic sections; usually microradiography. (05 Mar 2000) |
| historic ecosystem | The ecosystem intended for restoration which currently exists, or has been known to exist from historical documents, within the geographic region of a restoration site. (09 Oct 1997) |
| historic wetland | <ecology> An area of land that is no longer a wetland but which once was, usually refers to areas that were wetlands at the beginning of the Gold Rush (1849). (09 Oct 1997) |
| historical article | An article or portion of an article giving an account of past events or circumstances significant in a field of study, a profession, a discovery, an invention, etc. The concept of history is very wide, ranging from the dawn of time to the present. This publication type is often checked in conjunction with biography. (12 Dec 1998) |
| historical geographic locations | Countries known in remote history (as byzantium) or former names of countries reflecting political changes in the 20th century (as germany, east). (12 Dec 1998) |
| historiographer | An historian; a writer of history; especially, one appointed or designated to write a history; also, a title bestowed by some governments upon historians of distinction. Origin: L. Historiographus, Gr.; history + to write: cf. F. Historiographe. Source: Websters Dictionary (01 Mar 1998) |
| historiographership | The office of an historiographer. Source: Websters Dictionary (01 Mar 1998) |
| historiography | The art of employment of an historiographer. Source: Websters Dictionary (01 Mar 1998) |