There are a number of vectors that transmit communicable diseases. Lice, fleas, various types of flies, snails, rats and mosquitoes are widely found. Vectors are found within or close to human habitation; some breed in open water that may be found around homes and others breed inside the home. Certain vectors participate in the destruction of grains and household materials as well. In this study session, you will learn about the types of vectors that are of public health importance, their contribution to disease transmission and measures that can be used to control them.