11.   Will global warming mean the spread of tropical parasitic diseases?

12.   Maybe he was ill -- delirious with some sort of tropical disease?

13.   And runoff could spread an outbreak of dengue fever, a tropical disease carried by mosquitoes.

14.   And south Florida, along with southern Texas, is consistently recording cases of dengue, a mosquito-borne tropical disease.

15.   Are public health agencies ready for an expected increase in heat-related deaths and possibly the migration of tropical diseases farther north?

16.   As global warming installs itself, drought-prone places could suffer more, the frost line could move northward, as could tropical diseases, Schmandt said.

17.   At first, it was feared they had dengue, an infectious tropical disease characterized by severe pain and rash.

18.   At the time, the government provided little of either, even for those disabled or suffering from tropical diseases.

19.   A fatal tropical disease has infected large numbers of foxhounds in the United States.

20.   A scientist studying tropical diseases at the Yale University School of Medicine felt last week as if he had come down with malaria again.