Emerging infectious disease
Appearance
Emerging infectious diseases are diseases whose incidence has increased within the past two decades and threatens to increase in the newar future. Types of emerging diseases include:
- New disease caused by a newly identified microorganism or newly identified strain of a known microorganism (new disease, new microorganism) (e.g., SARS,AIDS)
- New infections resulting from changes or evolution of existing organisms (e.g., influenza; Influenza Report)
- Known infections spreading to new geographic areas or populations (e.g., West Nile virus infection)
- Previously unrecognized infections appearing in areas undergoing ecologic transformation
- Old infections reemerging as a result of antibiotic resistance in known agents or breakdowns in public health measures. (e.g. Tuberculosis, although this example can be disputed)