The best answer is "a" - the overuse of antibiotic.
Emerging disease are those whose incidence has increased in the past two decades or threatens to increase in the near future.
Such diseases include :
- Old infections emerging as a result of antimicrobial resistance due to indiscriminate or poor use or over use of antibiotics.
- New infections resulting from evolution or change of existing organisms.
- Previously unrecognized infections in areas undergoing ecological transformation
- Known infections spreading to new geographical areas or population.
Antibiotic resistance has been on the rise and is now major concern.
