| ASTMH | American Society of Tropical Medicine and Hygiene |
|---|---|
| DTCH | Diploma in Tropical Child Health |
| DTH | delayed-type hypersensitivity; Diploma in Tropical Hygiene |
| DTM | dermatophyte test medium; Diploma in Tropical Medicine |
| DTM&H | Diplomate of Tropical Medicine and Hygiene |
| dark field stop | <microscopy> A central stop for obtaining a dark field effect for low-power objectives. It is customarily used with a high numerical aperture, bright field condenser. (05 Aug 1998) |
|---|---|
| dark-ground illumination | dark-field illumination |
| dark reaction | <biochemistry, plant biology> The reactions in photosynthesis that occur after NADPH and ATP production and that take place in the stroma of the chloroplast. By means of the reaction, carbon dioxide is incorporated into carbohydrate. (18 Nov 1997) |
| dark t2 lesion | <radiology> (short T2), acute haemorrhage (deoxyHb), haemosiderin, physiologic iron (basal ganglia, etc.), mucinous lesions (?) most abnormalities have long T1 and T2 (dark/bright). Compare: bright T1 lesion. (07 Mar 2000) |
| macrocytic anaemia tropical | The macrocytic, megaloblastic anaemia of tropical sprue. (05 Mar 2000) |
| paraparesis, tropical spastic | Subacute paralytic myeloneuropathy occurring endemically in tropical areas such as the caribbean, colombia, india, and africa, as well as in the southwestern region of japan; associated with infection by type I human lymphotropic retrovirus (HTLV-I). Toxic nutritional factors have largely been ruled out as the cause of this syndrome, the primary clinical feature of which is progressive weakness of the legs and lower body. (12 Dec 1998) |
| sprue, tropical | A malabsorption syndrome occurring in the tropics and subtropics. Protein malnutrition is usually precipitated by the malabsorption, and anaemia due to folic acid deficiency is particularly common. Administration of antibiotics (especially tetracycline) and folic acid usually results in remission. (12 Dec 1998) |
| tropical | 1. Of or pertaining to the tropics; characteristic of, or incident to, the tropics; being within the tropics; as, tropical climate; tropical latitudes; tropical heat; tropical diseases. 2. [From Trope] Rhetorically changed from its exact original sense; being of the nature of a trope; figurative; metaphorical. "The foundation of all parables is some analogy or similitude between the tropical or allusive part of the parable and the thing intended by it." (South) Tropic month. See Lunar month, under Month. Tropic year, the solar year; the period occupied by the sun in passing from one tropic or one equinox to the same again, having a mean length of 365 days, 5 hours, 48 minutes.0 seconds, which is 20 minutes.3 seconds shorter than the sidereal year, on account of the precession of the equinoxes. Origin: Cf. L. Tropicus of turning, Gr. See Tropic. Source: Websters Dictionary (01 Mar 1998) |
| tropical abscess | <gastroenterology> An area of abscess formation (liquefaction necrosis) in the liver due to infection of the organ with amoebae. See: amoebiasis. (05 Feb 1998) |
| tropical acne | <dermatology> A severe type of acne of the entire trunk, shoulders, upper arms, buttocks, and thighs; occurs in hot, humid climates. (05 Mar 2000) |
| tropical anaemia | Various syndromes frequently observed in persons in tropical climates, usually resulting from nutritional deficiencies or hookworm or other parasitic diseases. (05 Mar 2000) |
| tropical boil | <dermatology> The lesion occurring in cutaneous leishmaniasis. (05 Mar 2000) |
| tropical bubo | A venereal infection usually caused by Chlamydia trachomatis, and characterised by a transient genital ulcer and inguinal adenopathy in the male; in the female, perirectal lymph nodes are involved and rectal stricture is a common occurrence. Synonym: climatic bubo, Favre-Durand-Nicholas disease, lymphogranuloma inguinale, Nicolas-Favre disease, sixth venereal disease, tropical bubo. (05 Mar 2000) |
| tropical canine pancytopenia | A fatal disease of dogs in Asia, Africa, and the U.S. Caused by Ehrlichia canis, transmitted by the tick Rhipicephalus sanguineus, and characterised by haemorrhage, pancytopenia, and emaciation. Synonym: tropical canine pancytopenia. (05 Mar 2000) |
| tropical climate | <geography> A climate which is typical of equatorial and tropical regions, i.e., one with continually high temperatures with considerable precipitation, at least during part of the year. (12 Dec 1998) |