Chapter 21, Problem 7CT

Summary Introduction

To answer:

Why dengue, yellow fever, and malaria are re-emerging in areas where they have long been eradicated.

Introduction:

Dengue is a disease caused by a family of viruses and the vectors for the transmission of this disease is mosquitoes. Yellow fever is spread by female Aedes aegypti and it is a “viral disease” that occurs for short duration. Malaria is caused by parasitic protozoans belonging to the Plasmodium type and are transmitted by mosquito vector. Once an infected mosquito bites a human, then the parasite further multiply in the host body.