Introduction

For many infectious diseases, host resistance may be improved by genetic means, i.e., by breeding for enhanced resistance. This is possible because genetic differences exist between host animals in their resistance to infection, or in the disease impact that infection causes, at many levels. Most obviously, diseases are usually restricted to one or a small number of host species. Additionally, within a species, differences are often seen between breeds in resistance to a specific disease and between individuals within a breed. This article considers the nature and mechanisms underlying variation in disease resistance, reasons why this variation exists despite natural selection, exploitation of this genetic variation for controlling diseases, and future trends in disease genetics.

101 Everyday Tips for Losing 10 Pounds

101 Everyday Tips for Losing 10 Pounds

Studies show obesity may soon overtake tobacco as the leading cause of death in world. Who Else Could Use 101 'Everyday' Ways to Lose 10 Pounds or more and Keep it Off! You've been putting it off too long. Hey, everyone needs to lose weight from time to time. You're no different!

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