| tropical mask | A bronze-coloured pigmentation, probably produced by hormone imbalance, occurring in gradually increasing areas on the face, neck, and chest in persons exposed continuously to the tropical sun; similar to chloasma of the temperate zone, but intensified because of strong sunlight. Synonym: tropical mask. (05 Mar 2000) |
|---|---|
| tropical measles | <infectious disease, virology> A disease of uncertain character, somewhat resembling rubella, occurring in southern China. (05 Mar 2000) |
| tropical medicine | <study> The branch of medicine concerned with diseases, mainly of parasitic origin, common in tropical and subtropical regions. (12 Dec 1998) |
| tropical myositis | A disease observed in Samoa and in tropical Africa, marked by pains in the extremities, fever of a remittent or intermittent type, and abscesses in the muscles in various parts of the body (may result in death from sepsis); causative organisms are Staphylococcus aureus and Streptococcus pyogenes, but usually the disease is associated with parasitic infections. Synonym: bungpagga, lambo lambo, tropical myositis, tropical pyomyositis. (05 Mar 2000) |
| tropical pyomyositis | A disease observed in Samoa and in tropical Africa, marked by pains in the extremities, fever of a remittent or intermittent type, and abscesses in the muscles in various parts of the body (may result in death from sepsis); causative organisms are Staphylococcus aureus and Streptococcus pyogenes, but usually the disease is associated with parasitic infections. Synonym: bungpagga, lambo lambo, tropical myositis, tropical pyomyositis. (05 Mar 2000) |
| tropical sore | Infection with promastigotes (leptomonads) of Leishmania tropica and of leishmaniasis major inoculated into the skin by the bite of an infected sandfly, Phlebotomus (commonly P. Papatasi); it is endemic in parts of Asia Minor, northern Africa, and India, and is known by innumerable names, each indicating its locality (e.g., Aleppo, Baghdad, Delhi, or Jericho boil; Aden ulcer; Biskra button); the ulcer begins as a papule that enlarges to a nodule and then breaks down into an ulcer. Two distinctive clinical and epidemiological diseases are recognised, the more common and widespread zoonotic rural disease with a moist acute form, caused by L. Major, with reservoir rodent hosts; and an urban, anthroponotic, dry, chronic form of leishmaniasis caused by leishmaniasis tropica, without a reservoir host, and now largely controlled. See: zoonotic cutaneous leishmaniasis, anthroponotic cutaneous leishmaniasis. Synonym: juccuya, Old World leishmaniasis, tropical sore. (05 Mar 2000) |
| tropical splenomegaly | A chronic disease, occurring in India, Assam, China, the area formerly known as the Mediterranean littoral areas, the Middle East, India, Pakistan, China, South and Central America, Asia, Africa caused by Leishmania donovani and transmitted by the bite of an appropriate species of sandfly of the genus Phlebotomus or Lutzomyia; the organisms grow and multiply in macrophages, eventually causing them to burst and liberate amastigote parasites which then invade other macrophages; proliferation of macrophages in the bone marrow causes crowding out of erythroid and myeloid elements, resulting in leukopenia, and anaemia, splenomegaly, and hepatomegaly which are characteristic, along with enlargement of lymph nodes; fever, fatigue, malaise, and secondary infections also occur; different strains of leishmaniasis donovani occur; leishmaniasis infantum in Eurasia, leishmaniasis chagasi in Latin America. Synonym: Assam fever, black sickness, Burdwan fever, cachectic fever, Dumdum fever, kala azar, tropical splenomegaly. (05 Mar 2000) |
| tropical splenomegaly syndrome | A syndrome characterised by persistent splenomegaly, exceptionally high serum IgM and malaria antibody levels, and hepatic sinusoidal lymphocytosis; believed to be a disturbance in the T-lymphocyte control of the humoral response to recurrent malaria. Synonym: tropical splenomegaly syndrome. (05 Mar 2000) |
| tropical ulcer | The lesion occurring in cutaneous leishmaniasis, tropical phagedenic ulceration caused by a variety of microorganisms, including mycobacteria; common in northern Nigeria. Synonym: tropical sore. (05 Mar 2000) |
| african tick typhus | One of the tick-borne rickettsial diseases of the eastern hemisphere, similar to Rocky Mountain spotted fever, but less severe, with fever, a small ulcer (tache noire) at the site of the tick bite, swollen glands nearby (satellite lymphadenopathy), and a red raised (maculopapular) rash. Also called fi |
| canine typhus | The uraemic form of canine leptospirosis. Synonym: canine typhus. (05 Mar 2000) |
| Manchurian typhus | Tick transmitted infection with Rickettsia sibirica. See: Korean haemorrhagic fever. Mexican typhus, infection with Rickettsia typhi (mooseri) causing a syndrome similar to epidemic typhus, but spread from rats to man by the rat flea (Xenopsylla (polyplax) cheopis). Spread from rat to rat by the rat louse (Polyplax spinulosa). Most common form of typhus in the United State. It has various geographical names based on region in which it was observed. (05 Mar 2000) |
| rat-flea typhus | Murine typhus, an acute infectious disease with fever, headache, and rash, all quite similar to, but milder than, epidemic typhus, caused by a related microoganism, rickettsia typhi (mooseri), transmitted to humans by rat fleas (xenopsylla cheopis). The animal reservoir includes rats, mice and other rodents. Murine typhus occurs sporadically worldwide but is more prevalent in congested rat-infested urban areas. Also known as endemic typhus and urban typhus of malaya. (12 Dec 1998) |
| recrudescent typhus | Recrudescence of epidemic typhus years after the initial attack. The agent that causes epidemic typhus (Rickettsia prowazekii) remains viable for many years and then when host defenses are down, it is reactivated causing recurrent typhus. The disease is named for the physician Nathan Brill and the great bacteriologist Hans Zinsser. (12 Dec 1998) |
| recrudescent typhus fever | Recrudescence of epidemic typhus years after the initial attack. The agent that causes epidemic typhus (Rickettsia prowazekii) remains viable for many years and then when host defenses are down, it is reactivated causing recurrent typhus. The disease is named for the physician Nathan Brill and the great bacteriologist Hans Zinsser. (12 Dec 1998) |