41.   The camp never became agriculturally self-sufficient and swift tropical diseases ran rampant.

42.   The law does not help against tropical diseases because it encourages research in part by giving companies the right to charge very high prices for their new products.

43.   The geographical range of tropical diseases would expand.

44.   The infection, known as trachoma, causes blindness the hard way, said Dr. Joseph Cook, director of tropical disease research for the Edna McConnell Clark Foundation.

45.   The ranges of mosquito-borne tropical diseases like malaria, dengue fever and encephalitis and waterborne diarrheal diseases could expand, for instance.

46.   The tropical disease, which causes elephant-like swelling of the legs or genitals, has baffled physicians for years.

47.   There, he also contracted bilharziasis, a tropical disease that went undiagnosed for several years and left him crippled for the rest of his life.

48.   They spent last winter in London studying tropical diseases.

49.   To stimulate research on new drugs, several groups concerned with tropical diseases are forming public-private joint ventures.

50.   Tropical diseases like malaria and dengue fever could spread.