Antimicrobial drug resistance refers to the ability of microbes such as bacteria, fungi virus and parasite, to resist the effects of drugs and medications, which were used to treat them earlier. The type of antimicrobial resistance, in which microbes resist to multiple antimicrobials, is known as multiple drug resistance. There are multiple causes for such resistance, such as natural (biological) causes, inappropriate use of antibiotics, water pollution, inadequate diagnostics, etc. All microbes have the tendency to develop resistance. Fungal resistance, antibiotic resistance, antiviral resistance, antiprotozoal resistance, etc. are some forms of antimicrobial resistance. This book is a valuable compilation of topics, ranging from the basic to the most complex theories and principles of antimicrobial drug resistance. It explores all the important aspects of the subject in the present day scenario. Coherent flow of topics, student-friendly language and extensive use of examples make this book an invaluable source of knowledge.