The use of antimicrobials has increased to reduce illness and death from many infections, such as tuberculosis and pneumonia. The extensive use of certain antimicrobials and antibiotics has resulted in the development of drug resistance in the micro-organisms and has made these treatments less effective. Drug resistance occurs when the drug loses its ability to kill the micro-organism as a result of which the micro-organisms continue to grow and cause infection even in the presence of the drug. There are many pathogens that are drug resistant such as methicillin-resistant Staphylococcus aureus, carbapenem-resistant Enterobacteriaceace, etc. Staphylococcus aureus is resistant to several antibiotics. This book presents the complex subject of drug resistant infectious diseases in the most comprehensible and easy to understand language. It covers in detail some existent theories and ethical issues revolving around the drug resistant infections. Those with an interest in this field would find this book helpful.