The camel (Dromedary or Bactrian) has been serving millions of people living in the driest (hot or cold) areas of the World for centuries. It provides food, fiber, transportation and social status.Because presence a very few numbers of books about an infectious diseases in camel, so that this book was written. However, during the last two decades there has been a tremendous increase in the number of scientific papers in the world literature. It is now known that infectious diseases cause 50% of fatalities in New World camelids (NWC) and 65% in Old World camelids (OWC). Parasitic, viral, fungal and bacterial diseases are the main causes in NWC.