Parasitic diseases have been considered uncommon in developed countries but many are now emerging diseases in these parts of the world. Discuss factors that contribute to this shift

Question

What will be an ideal response?

Answer 1

Parasitic disease in Europe, North America, and other developed regions of the world declined with the application of rigorous control practices: proper public sanitation, water purification, inspections, vector control, and so forth. One consequence of the success is that physicians trained in these areas of the world rarely consider parasitic disease early in the diagnostic process, and untreated infections may spread in the meantime. Another result of the success is lax regulation as people forget the importance of water and food inspection, vector control, maintenance of public sanitation facilities, and so forth.
International travel, emigration, and importation of food and exotic animals have carried parasites to parts of the world where they have not been seen in decades or have never before occurred, and sometimes conditions are right for them to become established. Shifting climate patterns are changing the distribution of vectors of parasites, and the vectors introduce the parasites into their new ranges.