Get MDR full form and full name in details. Visit to know long meaning of MDR acronym and abbreviations. It is one of the best place for finding expanded names. What is the full form of MDR? - MultiDrug-Resistant - MultiDrug-Resistant (MDR), also known as MultiDrug Resistance (MDR) or Multiple MDR stands for Merchant Discount Rate and is the fee charged by payment service providers for accepting card and online payments. Learn about MDR charges, PSP fees, interchange fees and how to negotiate them for your business. Multiple drug resistance (MDR), multidrug resistance or multiresistance is antimicrobial resistance shown by a species of microorganism to at least one antimicrobial drug in three or more antimicrobial categories. [1] Antimicrobial categories are classifications of antimicrobial agents based on their mode of action and specific to target organisms. [1] The MDR types most threatening to public health are MDR bacteria that resist multiple antibiotics; other types include MDR viruses, parasites ...