ANTC67H3 Chapter Notes - Chapter 5: Microbiological Culture, Causative
Document Summary
Can be environmental or genetic causes, which usually overlap. Sufficient cause is not one single factor but many factors. Each sufficient cause has a necessary cause as a component. Casual pathway one factor leads to another until eventually the specific pathogenic agent becomes present in the organ that gets damaged: hierarchy of causes. First disease to meet these requirements anthrax. Rules are inadequate bc: many causes act together, single factor has many outcome diseases, causative organism may disappear when a disease has developed making it hard to demonstrate the organism in a sick person. Good for: when cause is highly pathogenic infectious agent, chemical poison or other specific factor, no healthy carrier of the pathogen. Risk factor ;;> describes factors that are positively associated with the risk of development of a disease but not sufficient enough to cause a disease.
