The Development of International Transportation and Its Effect on the Practice of Tropical Medicine

Herbert C. ClarkGorgas Memorial Laboratory, Panama, Republic of Panama

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Very few diseases are limited to the tropics, but many diseases have a high incidence in the warm countries as compared to the rate for the same diseases in other regions. It is impossible sharply to define Tropical Medicine, but one can say that the term applies to those diseases of high incidence in the tropics caused by pathogenic parasites and by diet deficiency. The practice of tropical medicine, therefore, consists of the pathological study and treatment of these diseases, and the demand is for high grade training in protozoology, helminthology, medical entomology, and the chemistry and physiology of nutrition. The future no doubt will and some detailed study in relation to the white race's reaction to light, heat, and humidity.

Our modern transportation certainly will expand the duties of the various quarantine services in regard to defenses against the regional intermingling of the diseases of man, domestic animals, and plants.