| Chabertia | A genus of strongyle nematodes parasitic in animals. The species Chabertia ovina, the bowel worm, is found in the digestive tract of sheep, goats, cattle, and some wild animals; it feeds on the mucosa of the gut, where in large numbers it can produce considerable damage. (05 Mar 2000) |
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| chad | A republic in central africa, west of sudan. Its capital is n'djamena, called fort-lamy before 1973. Explored in 1891 by the french, it became part of french equatorial africa in 1910 and, after many changes of status, became independent in 1960. The republic is named from lake chad, from the arabic tsad, a local word meaning large expanse of water (or lake). (12 Dec 1998) |
| Chaddock reflex | <clinical sign> When the external malleolar skin area is irritated, extension of the great toe occurs in cases of organic disease of the corticospinal reflex paths. Synonym: Chaddock reflex, external malleolar sign. (05 Mar 2000) |
| Chaddock sign | <clinical sign> When the external malleolar skin area is irritated, extension of the great toe occurs in cases of organic disease of the corticospinal reflex paths. Synonym: Chaddock reflex, external malleolar sign. (05 Mar 2000) |
| Chaddock, Charles | <person> U.S. Neurologist, 1861-1936. See: Chaddock reflex, Chaddock sign. (05 Mar 2000) |
| Chadwick's sign | <clinical sign> A bluish discoloration of the cervix and vagina, a sign of pregnancy. (05 Mar 2000) |
| Chadwick, James | <person> U.S. Gynecologist, 1844-1905. See: Chadwick's sign. (05 Mar 2000) |
| chaeta | Synonym: seta. Origin: Mod. L. Fr. G. Chaite, stiff hair (05 Mar 2000) |
| chaetomium | A genus of ascomycetous fungi of the family chaetomiaceae, order sordariales including several that are destructive to paper, plastics, and other materials. (12 Dec 1998) |
| chafe | To cause irritation of the skin by friction. Origin: Fr. Chauffer, to heat, fr. L. Calefacio, to make warm (05 Mar 2000) |
| chaff | <plant biology> Thin, membranous scales or bracts, thin, dry unfertilized ovules among the fully developed seeds of a fruit. (21 Mar 1998) |
| chagas cardiomyopathy | Cardiomyopathy with conduction defects and cardiac enlargement characteristic of the last phase of chagas disease. (12 Dec 1998) |
| Chagas disease | <infectious disease> A parasitic disease caused by the American strain, Trypanosoma cruzi. Chagas disease is usually transmitted by the bite of the kissing bug, but may also follow breast feeding (to infants) and blood transfusion. Although much more common in South America, it does, on rare occasions, occur in the U.S.A. A nodular swelling (chagoma) appears at the site of inoculation following a bite. The acute phase of the disease can last 2 to 3 months and patients present with fever, headache, anorexia, conjunctivitis and myocarditis. Infants can develop meningitis and heart involvement. Trypanosomiasis can cause congestive heart failure and ventricular aneurysms. Treatment is with nifurtimox. (21 Mar 1998) |
| Chagas' disease | Trypanosomiasis caused by Trypanosoma (or Schizotrypanum) cruzi and transmitted by certain species of reduviid (triatomine) bugs. In its acute form, it is seen most frequently in young children, with swelling of the skin at the site of entry, most often the face, and regional lymph node enlargement; in its chronic form it can assume several aspects, commonly cardiomyopathy, but megacolon and megaesophagus also occur; natural reservoirs include dogs, armadillos, rodents, and other domestic, domiciliated, and wild mammals. Synonym: Chagas' disease, Chagas-Cruz disease, Cruz trypanosomiasis. (05 Mar 2000) |
| Chagas, Carlos | <person> Brazilian physician, 1879-1934. See: Chagas' disease, Chagas-Cruz disease. (05 Mar 2000) |