Infectious diseases

Science

Definition

Illnesses caused by pathogenic organisms such as bacteria, viruses, fungi, or parasites that can spread between individuals. Transmission can occur through direct contact, airborne droplets, contaminated food or water, or vectors like mosquitoes.

Examples

  • Influenza spreading through airborne respiratory droplets
  • Malaria transmitted by Anopheles mosquito bites
  • Food poisoning caused by Salmonella bacteria in undercooked chicken

Related Terms

Bacteria and viruses Immune response Immune system Biodiversity

Study This Concept

Practice infectious diseases with free review games in these units:

Biology Unit 10: Microbiology and Disease