CLASSIFICATION OF DISEASES

• Infectious Disease - any disease caused by the direct effect of a pathogen
• Communicable Disease - capable of being spread from person to person through either direct or indirect mechanisms
• Contagious Disease - easily spread from person to person
• Iatrogenic Disease - contracted as the result of a medical procedure
• Nosocomial Disease - acquired in hospital settings
• Zoonotic Disease - transmitted from animals to humans
• Noncommunicable Disease - infectious disease not spread from one person to another
• Noninfectious Disease - diseases not caused by pathogens
• Acute Disease - pathologic changes occur over a relatively short time and involve a rapid onset of disease conditions
• Chronic Disease - pathologic changes can occur over longer times
• Latent Disease - causal pathogen goes dormant for extended periods of time with no active replication