EESA10H3 Lecture Notes - Lecture 7: Infectious Mononucleosis, Human Papillomavirus Infection, Cancer Vaccine
13 Apr 2016
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Document Summary
Infectious diseases are host-centric (human centric); human body is a habitat and host to many organisms. Associations that harm or bother us are infectious diseases; agents are pathogens. There are special illnesses referred to as zoonosis- which are infectious diseases transmissible to humans from other animals; those animals that are in close proximity to humans. There are many different types of pathogens: worms (unicellular; parasitic), protozoa (unicellular; parasitic), and bacteria (unicellular; most not parasitic aerobic vs anaerobic; or tolerate either some form spores) and viruses (strand of dna or rna; parasitic). Bacteria can be both aerobic (requiring air) or anaerobic (without oxygen). Bacteria have an organized cell but not a nucleus; there is genetic material inside the cell. In challenging conditions such as different temperatures/acidity, bacteria can form spores (survival dormant state) and wait for the environment to return to normal. Protozoa are single-cell; microorganisms and are much bigger in size than bacteria.
