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CHAPTER 1. INTRODUCTION AND LITERATURE REVIEW Introduction
The Importance of Insects in Human HealthMembers of five orders in the Class Insecta feed on the blood of vertebrates:Phthiraptera (chewing and sucking lice, separated by some authors into two separate orders, the Mallophaga and Anoplura, respectively, of which only the Anoplura takes blood), Hemiptera (true bugs), Diptera (true flies), Siphonaptera (fleas) and a few species of Lepidoptera (moths and butterflies). In addition, one order in th...