Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Ticks are a well-known agent spreading diseases that affect both humans and animals (including mammals, reptiles and birds). Moreover, a bite by a single tick during its blood meal may transmit various pathogens, leading to difficulties in diagnosis. Since ticks are widely distributed throughout the world, individuals engaged in outdoor activities or outdoor workers in warm and humid areas with woods, bushes or high grass are at risk to become infected. Learn more about major tick-borne diseases, their symptoms and treatment in this book.