Antimicrobial Resistance and Drug Resistance

Multi-drug resistance (MDR) in microbial pathogens develops through specific evolutionary mechanisms. Statement 1 is incorrect: Genetic predisposition of humans does not cause microbial resistance; the resistance develops in bacteria through selection pressure and genetic mutations. Statement 2 is correct: Incorrect antibiotic dosing (too low or too short duration) allows pathogens to survive and develop resistance genes. Statement 3 is correct: Antibiotic use in livestock farming creates enormous selection pressure for resistant bacteria in animal populations, which can then transmit to human populations through food chains. This is a major cause of MDR in India. Statement 4 is incorrect: Multiple chronic diseases in humans do not cause microbial drug resistance; however, immunocompromised individuals with chronic diseases may be more susceptible to resistant infections. The primary drivers of MDR are suboptimal antibiotic use and overuse in agriculture. > MDR drivers = Suboptimal dosing + agricultural antibiotics use (NOT human genetics or disease comorbidity). Answer: b.