Wiktionary
n. (context medicine English) any infectious disease which occurs only, or more often, in tropical or subtropical regions
Wikipedia
Tropical diseases are diseases that are prevalent in or unique to tropical and subtropical regions. The diseases are less prevalent in temperate climates, due in part to the occurrence of a cold season, which controls the insect population by forcing hibernation. However, many were present in northern Europe and northern America in the 17th and 18th centuries before modern understanding of disease causation. The initial impetus for tropical medicine was to protect the health of colonialists, notably in India under the British Raj. Insects such as mosquitoes and flies are by far the most common disease carrier, or vector. These insects may carry a parasite, bacterium or virus that is infectious to humans and animals. Most often disease is transmitted by an insect "bite", which causes transmission of the infectious agent through subcutaneous blood exchange. Vaccines are not available for most of the diseases listed here, and many do not have cures.
Human exploration of tropical rainforests, deforestation, rising immigration and increased international air travel and other tourism to tropical regions has led to an increased incidence of such diseases.
Usage examples of "tropical disease".
Like everyone else within a thousand miles, he has a tropical disease.
They weren't even sure that it was really a tropical disease—.
He was visibly weak, suffering from tropical disease, and completely worn-out.
Tens of thousands of young Portuguese conscripts had come out to Africa, many of them to bleed and die by bullet and mine and tropical disease far from their native land.
Cigarette ends spotted the linoleum like the pock-marks of some tropical disease and great piles of newspapers, fine art publications and scientific journals were stacked into every available corner.
There were children, some of them tiny, some with rickety legs, some with puzzled faces bloated by tropical disease.
He listened restlessly, while the Frenchman explained that the steel box contained valuable serum for treating a tropical disease with a name that Rawcliff had never heard before, and which he suspected the Frenchman might have invented.