HE101 Lecture Notes - Lecture 11: Mycosis, Hand Washing, Safe Sex
Document Summary
Existed for centuries, more recently- relatively new diseases. Some infectious diseases returning: many pathogens mortality related to small # of diseases in canada- several public health agencies. Why: ecological changes, population growth, drug resistance, international trade & travel inadequate public health, choosing not to vaccinate. Modifiable risk factors age, heredity, environmental conditions poor diet, physical inactivity, stress, inadequate sleep, drug misuse or abuse, poor personal hygiene. Pathogens: modes of transmission: direct contact w/ infected person, indirect contact ex. Touching object person touched: autoinoculation ex. hands to face, airborne or waterborne pathogens, food-borne pathogens, animal-borne pathogens ex. *influenza & pneumonia- elderly, hiv patients, young kids ranked 8 for infectious disease mortality in canada. Immunity: ability to resist disease by counteracting the invading pathogen. Example: type a blood people, need type a; also similar for organs. Immune system: network or cells, tissues, organs: key players: leukocytes; white blood cells (wbcs) Before antigen has infiltrated cells: antibodies: immunoglobulins.
