ANTC68H3 Lecture : ANTC68_Lecture_3.docx
Document Summary
Can be epidemic because it causes morbidity and mortality. One of most extensive / diverse biomes, yet one of the most threatened due to deforestation. High species diversity (over 50% of world) Tropical pathogens and vectors generally have very short generation times, thus there is great potential for evolution of new pathogens and vectors: pathogens are diverse. Even if not originally adapted to human populations, their short generation times ensure continued opportunities for the evolution of new forms that may be able to cross species boundaries and lead to human infections. Vectors able to reproduce effectively year-round in tropics: temperate areas causes vectors to die off or lay dormant. Humans more exposed to intestinal parasites transmitted by contaminated water or soil. Humans spend more time inside, facilitating transmission of respiratory infections. 60 countries with over 2 billion people situated entirely or partly in humid tropics (high population) Tropical populations growing rapidly: increases of 1. 1-3. 8% per year.
